The Brief

On a recent triple digit summer day, I made my way out to a dusty field at UC Riverside, the research center of California’s citrus universe.

The UC Riverside Citrus Research Center is lined with row after row of citrus trees. It's also home to the Climate Ready Tree test plot.

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Row after row of tangerines, oranges and pomelos —11,000 in total — baked under a heat dome. Off in the distance, wildfire smoke passed in front of the San Bernardino Mountains, which had been covered in thick snow just a few months ago.

The dusty field is just one of the many plots that the university uses to trial new trees, grow budwood for distribution and come up with solutions for devastating problems like Huanglongbing, a bacteria driven greening disease that’s threatening trees world wide.

However, I was there to check out a block of 48 trees sitting along a fence that look nothing like the thousands of citrus around them. Inconsequential at first glance, you could easily imagine them along any road in Los Angeles, but that’s kind of the point. The trees are being tested to see if they can survive our hellishly hot and dry future driven by climate change.

Where, how and why these trees are being tested

There are 12 different types of trees and four of each at the UC Riverside test plot.

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It’s a collection of 12 different species — four of each — pulled from around the world and being run through the gauntlet by the U.S. Department of Agriculture. Planted seven years ago, they were given supplemental water to help them get established, but since then they’ve had to survive on their own through record-setting heatwaves and drought years.

The Texas, or escarpment, live oak was struggling and nearly dead at the UC Riverside plot. It's reportedly doing better at a plot along the coast.

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The trees are being assessed for a number of factors including attractiveness, whether they provide good shade, how much work it takes to maintain them (less pruning means lower maintenance costs) and whether they can survive without much water.

The experiment is expected to run for at least 20 years, but visit the plot today and it's clear which trees are thriving. Surprisingly, just because a tree comes from a hot climate doesn’t mean it’s going to do well.

“What kind of choices are we going to be able to make in the future?,” said Natalie van Doorn, U.S. Forest Service scientist and co-creator of the experiment known as Climate Ready Trees. “Are we going to have enough water to make that decision that yes we want to keep watering our trees?”

If not, we’ve got to have viable candidates that we know will thrive and provide critical tree cover, which for residents, can be a matter of life or death.

Why L.A.'s hundreds of thousands of trees matter so much

Click for more details on the benefit of trees from TreeKeeper

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Trees are an absolutely critical part of our infrastructure. They have a marked impact on human and ecosystem health.

The red push pistache had one of the densest canopies at the test site.

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Trees can:

• Help drop temperatures in urban areas by as much as 45 degrees
• Reduce energy use
• Suppress noise
• Improve air quality
• Sequester water
• Help provide homes to all sorts of creatures, all according to the Environmental Protection Agency.

Which is why any sort of major threat to the more than 700,000 street trees planted across the city of L.A. is of major concern, and that's what climate change is doing.

Much of our urban forest, as it’s known, was planted over the past 100 years as the region developed. As people migrated from other parts of the country they often wanted to plant the trees that they were familiar with, though that could mean species from wetter climates.

The sweetgum tree, whose spiky seed balls you’ve likely stepped on while walking through a park, is a decent example. It’s originally from the eastern area of the country and doesn’t love drought conditions, thriving in the moist soils of the Mississippi Delta. More than 25,000 of them are planted across the city, according to a tree inventory.

A red pistache

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The flowers of the desert willow are a beautiful pink.

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“I think in general, many of urban forests contain what I would call legacy plantings that occurred after World War II, when people were building homes and moving in and planting trees. And so those trees now, maybe 40, 50, 60 years old, they were planted when water was abundant. They've grown accustomed to having water and of course they're not necessarily as well adapted to hot dry conditions,“ said Greg McPherson, retired research scientist with the U.S. Forest Service, and one of the creators of the experiment.

We were long able to satisfy a broad range of moisture requirements because we imported and dumped all but unlimited gallons of water all over our landscapes, often in an effort to keep our lawns green.

That is until this past decade, when drought and water cuts became the norm.

What happens to water-stressed trees

The flowers of the maverick mesquite.

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The flowers of the desert museum palo verde.

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Water-stressed trees are more susceptible to pathogens and insect attacks, and are, predictably, more likely to die than healthy happy trees. One only need look to the Sierra Nevada to understand how bad things can get. More than 100 million trees have died over the past decade in part due to drought stress.

There are no clear mortality estimates for LA’s urban forest over the past decade, so we can’t say whether extreme conditions have led to more tree deaths in our area. And unless we had a widespread, granular tree tracking program, it’s going to be tough to determine why an individual tree is lost.

There are hundreds of thousands of street trees across the city, and urban trees face all sorts of challenges trees in our forests don’t. Yard tools can damage them and lead to the introduction of disease, poor pruning practices can lessen tree resilience and sometimes people just cut them down because they want to redo their yards.

That said, conditions are becoming more challenging for our urban forest and we could be on the path to greater die off as a result. Longer, more sustained droughts are becoming more common, meaning less water for irrigated landscapes, and more extreme heat days mean trees require more water to survive.

While this palo blanco, originally from northern Mexico, was looking OK, another one was struggling substantially.

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Odds are we haven’t seen the worst of it. Even though we’ve had a handful of water cuts over the past decade, lawns are still green and trees still often getting supplemental irrigation.

Given how bad cuts got before this wet year, it’s easy to imagine a point where outdoor watering is limited to the point that lawns start to finally die off and the trees that rely on that same supplemental water start to die too.

“The roots of those trees are near the surface because turf is irrigated in frequent, but not heavy doses. So the water stays in the upper surface of the soil and that’s where the roots are,” McPherson said.

Depending on the variety, trees can take decades to become established and provide meaningful shade. If we’re planting something today with the expectation that it’ll survive in the lawn-less future we’re charging towards, it’s important to find species that can thrive on minimal supplemental inputs.

Our need for more resilient trees

McPherson’s efforts to find what the experiment is calling ‘climate-ready trees’ began about two decades ago, when he recognized what the existential threat of warming trends could mean for our urban forests.

The Desert Museum Palo Verde doesn't provide as much shade as the other trees, but it's nice to look at and likes hot weather.

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“I began in 1999 when I got a 18 wheeler full of desert trees from Arizona shipped up and planted them all around Sacramento and Davis, and really started evaluating their performance,” said McPherson.

Some, like the Palo Verde, even though it can thrive in hot climates, struggled.

“It just grew so fast that the top would outgrow the roots and it would blow over in our wind,” he said. “Some of them worked, some didn’t. But that led to the idea that we need to evaluate more species”

The rosewood tree had a sizable canopy that provided good shade.

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In 2015 he and van Doorn got a grant to begin trialing trees at a test site at UC Davis, and eventually along the coast in Irvine, and in the scorching hot environment of Riverside.

So which trees have been thriving?

Though the experiment still has a number of years to go, I made the trip to the Riverside plot because out of the two Southern California plots, I wanted to see which trees were doing the best in the most extreme conditions.

Many were thriving, but three stood out because they looked healthy, cast wonderful shade and were quite attractive. They’d be wonderful along any street.

The Red Push Pistache was the first to catch my eye in part because it had one of the thickest canopies and beautiful leaves. It’s originally from Arizona.

The red push pistache seemed to be thriving.

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The canopy of the rosewood, originally from India, rivaled the pistache and the Desert Willow, native to the southwest, put out gorgeous pink flowers.

A rosewood tree.

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The desert willow was thriving at the test plot.

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The Honey Mesquite, also native to the southwest, was covered in bright yellow flowers and teaming with so many bees that the whole tree appeared to vibrate.

The honey mesquite can be invasive in some environments.

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The ghost gum, a type of eucalyptus from Australia was also well established. However, because of their oil content eucalyptus tend to burn violently in wildfires. Maybe not the best choice for fire prone locations. And the tecate cypress is native to the region and looks like it could be trimmed into a hedge. It's struggled a bit at the plot.

The ghost gum is a type of eucalyptus from Australia.

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The Tecate Cypress is native to Southern California and could work well in a hedge.

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Then there were the ones that appeared to need more maintenance, like the Palo Verde, which I see planted in drought tolerant landscapes across the area. It can thrive in hot conditions, and with a bit of pruning it might’ve looked better. Problem is it didn’t provide much shade.

And, to me, the Texas Live Oak looked to be an outright failure, as they were close to dead. It's reportedly done better in cooler conditions at the team's other test site in Irvine.

A desert museum Palo Verde

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A live oak

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Go see the trees yourself

Each tree in the private research plot has a counterpart located in parks across the region, in an effort to help determine how they do when they’re not babied.

“If you were looking at reference versus park sites, the reference sites are doing better as far as survivorship and growth. In the park sites there just is a lot of variability,” said van Doorn.

If you’re curious about how they’re doing, you can actually go visit them in person.

Locations of tree testing in inland Southern California

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Coastal testing locations for trees.

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For instance, here’s a map of tree locations if you live near Woodley Park in the San Fernando Valley.

Or if you’re over on the west side, the trees might be performing completely differently at a spot like Vista Del Mar Park.

If you want a more granular look at all of the trees, the researchers issued an update three years ago here.

If you have any favorite drought tolerant trees, shoot me a note below.

Richard Marx knows how to write a pop hit.

His first seven singles all reached the top five of the Billboard Hot 100, with hits like "Satisfied" and "Right Here Waiting." His writing credits include Luther Vandross' "Dance With My Father."

But his latest album is showcasing a different side of him.

After Hours blends Great American Songbook standards with original songs that Marx wrote in that classic style. There's also a five-song EP, After Hours: Live From the Grammy Museum, which came from his August performance there.

Marx will bring the album to the Yaamava’ Theater at Yaamava’ Resort & Casino in Highland on Sunday, Nov. 1.

From backup singer to hitmaker

Marx's journey started when he arrived in Los Angeles at 18.

"The first door opened for me kind of immediately," Marx said in an interview with LAist Morning Edition Host Austin Cross. "The first job I had right out of the gate was singing background vocals for Lionel Richie on his first solo album."

That connection allowed Marx to meet Kenny Rogers, with whom he wrote the No. 1 country song "Crazy." But it would still take years before Marx would find his own success as an artist.

"I remember when I started having success as a songwriter and singing on all these other people's hit records," Marx said. "I really thought that would be the fuel, but every record company rejected me for several years. I got rejected time and time again on songs that became massive hits. So, you have to just believe in yourself and wait for that right opportunity to come around."

Writing like it's 1948

Marx's new album is a real departure from the music that made him a star. Initially, he didn't think he was ready to record these types of songs.

"It was a delusion on my part that I wasn't old enough," Marx said. "I thought, 'I'm not old enough to sing those old standards.' Then it dawned on me that I'm 63 years old."

Marx decided not to just record American classics. He also wrote original music in that same style.

"When I realized that I could create something special in writing half the album, it all started to make sense to me," Marx said. "And I have to say that the writing of this album was the most challenging and enjoyable songwriting I think I've ever done."

The first song Marx wrote for the album was called "All I Ever Needed," which features a trumpet solo by Chris Botti.

"I pretended that I was a young, struggling songwriter in 1948, trying to get Sinatra to cut one of my songs," Marx said. "I took a long walk, and I thought whatever comes into my mind, I'm gonna go with it. An hour later, when I came back home, that whole song was written."

For another song called "Magic Hour," Marx got an assist from his wife, Daisy Fuentes.

"It's my favorite song on the album," Marx said. "The lyrics plagued me for a while. So [Fuentes] and I sat down and had a martini, and she just kept talking and telling me this story, and I turned it into lyrics."

Another highlight on After Hours is Marx's duet with Rod Stewart on the song "Young at Heart."

"Rod was just such a hero my whole life," Marx said. "We just kind of accidentally became great friends over the last four years. And in that process, it was Rod who suggested that we do a duet."

Marx is now looking for new goals.

"I'm in the process now of building my new bucket list, and there's really nothing on it so far," Marx said. "I wanna keep making music that makes me feel the way this album made me feel."

See him live

Tickets for Marx's upcoming show at the Yaamava’ Theater at Yaamava’ Resort & Casino in Highland on Sunday, Nov. 1, are available through AXS.

Actor Walter Koenig, who played Ensign Pavel Chekov, the youthful Russian navigator on the “ Star Trek ” television series and several movies, has died. He was 90.

Koenig died Monday at his home in the North Hollywood neighborhood of Los Angeles, talent agent Zachery McGinnis said in a statement.

In “Star Trek,” Ensign Chekov was the sole Communist-bloc member of the spaceship Enterprise bridge staff. His friendly, supportive presence showed how the rival nations (in the far-off future in which the show was set) were capable of working together.

Speaking heavily Russian-accented English, Chekov embodied stereotypical Russian personality traits, including fierce pride, love of poetry and blind loyalty.

“Star Trek” ran on NBC from 1966 to 1969 and has had an almost unprecedented afterlife as fans, or Trekkies, kept interest in the show alive.

“My heart is heavy,” Koenig's castmate, George Takei, said in a post on the social platform X. “Walter was more than Chekov. He was a writer, a teacher, a thoughtful man, and a loyal friend.”

“Walter’s legacy extends far beyond the screen. Through countless convention appearances and interactions with fans, he shared his kindness, wit, and appreciation with everyone fortunate enough to meet him. He understood what Star Trek meant to people and embraced the community that grew around it,” McGinnis said. “Thank you, Walter, for the memories, the inspiration, and for boldly going where few have gone before.”

McGinnis said Koenig died surrounded by his daughter and niece.

Koenig played Chekov in seven “Star Trek” movies starting in 1979, as well as innumerable other spinoffs, including writing a “Star Trek” book, “Chekov's Enterprise,” in 1980. The TV show has also inspired two spinoff TV series with new casts, and conventions that draw thousands of fans.

He returned to the science fiction genre with occasional appearances in the syndicated 1990s TV series “Babylon 5.”

For nearly a decade, California’s Yes In My Backyard activists and other pro-development advocates have wanted to overhaul California’s signature environmental law to clear the way for more housing construction.

Now Proposition 45 is on the ballot. Supporters say it would, among other things, overhaul that law, known as the California Environmental Quality Act, or CEQA, to clear the way for — you guessed it — more housing construction.

So why are YIMBYs divided?

Assemblymember Buffy Wicks, an Oakland Democrat and one of the movement's most stalwart champions in the Legislature, is for it. So is the bulk of the building industry, including many major for- and non-profit developers.

Bay Area pro-housing advocates Eastbay for Everyone and the Greenbelt Alliance, two typical allies of Wicks, are emphatically against it.

In the uncommitted middle lies the lion’s share of California YIMBYism: Abundant Housing Los Angeles, SPUR, and both California YIMBY and YIMBY Action — the movement’s two flagship advocacy organizations — have all taken neutral positions.

“It’s been a weird campaign so far,” said Ali Sapirman, advocacy manager at the Housing Action Coalition, an urban building industry group that supports the measure. “The housing community has been a little bit fractured.”

Those fissures aren't over whether more homes should be built across California. Instead, it mostly boils down to a question of where.

“The central question here is how you feel about sprawl,” Max Dubler of California YIMBY wrote in the group’s non-endorsement statement, referring to low-density housing development at the edge of metro areas. Though some exurban growth “will necessarily be part of solving our housing shortage,” he expressed concern about making it easier to build “car-dependent sprawl housing and the freeways and water infrastructure necessary to serve that sprawl.”

To sprawl or not to sprawl

For nearly a decade, the Legislature has been on a tear, passing “streamlining” bills aimed at speeding up the regulatory approval of new construction. Almost all of those laws have only applied to projects in places where homes and other infrastructure already exist.

Prioritizing so-called infill development helped wrangle together a coalition of developers and construction labor unions, but also a diverse swath of Democratic-leaning advocates whose interest in seeing more apartments and condos goes beyond the cause of affordability alone. That includes climate activists who want to see less commuter car traffic; transit, bicycle and pedestrian advocates who want more riders and walkers and urbanists who want Los Angeles to more closely resemble Barcelona.

In breaking from that urban focus, Prop. 45 is driving a wedge inside that coalition.

If passed, the measure would speed up the review process required under CEQA (pronounced “see-kwah”) for all types of housing projects. That includes transit-adjacent downtown condo towers, but also freshly paved subdivisions at the metropolitan fringe.

The measure is “a doubling down on essentially 75 years of land-use patterns that we know haven't worked,” said Jordan Grimes, legislative director with Greenbelt Alliance, which opposes the measure. “It's a return to the sprawl era.”

Not everyone in the movement necessarily sees that as a bad thing. Among those who want California to build its way out of its current housing shortage, opinions differ over whether more environmentally-friendly infill development alone is up to the task.

“I'm an ‘all of the above’ person when it comes to housing,” said Wicks, explaining her support of the measure. “I think we need housing of all different types, shapes, and sizes.”

An earlier version of this rift first emerged earlier this decade when a handful of Bay Area tech investors announced plans to build a brand new city on Solano County farmland in 2023 under the banner of California Forever. Some YIMBY commentators applauded the plan as a welcome injection of much-needed supply. Others decried it as sprawl dressed in urbanist clothing.

With Prop. 45, that regional debate is now playing out at a statewide scale.

Housing front and center 

Prop. 45 is about much more than housing policy.

CEQA requires public agencies to review the possible environmental consequences of the decisions they make, including the permitting of private projects. For decades industry groups, developers and, more recently, housing supply boosters have said the law makes it too easy for project opponents to jam up worthwhile projects by repeatedly demanding additional analysis.

“The clock is endless and the number of people and entities who can challenge you are also endless,” said Linda Mandolini of Eden Housing, an affordable housing developer.

Prop. 45 would not exempt any projects from environmental review outright. But for projects deemed "essential," it would narrow the focus of these reviews and require them to wrap up within 365 business days. Any resulting litigation would also face a shot clock; Judges would have 270 business days to resolve them. Such lawsuits would also be made harder to sustain in court. Aside from housing, essential projects include roads, hospitals, schools, clean energy projects, water and broadband infrastructure.

But housing has loomed large in the electoral debate. The Yes on 45 campaign has touted the support of affordable housing developers and housing advocates, while pointing to housing affordability concerns as the initial impetus for the measure.

It’s easy to see why. Environmental challenges to often innocuous-seeming housing projects have regularly generated headlines for years, helping to cement the idea among lawmakers and many voters that CEQA is a major cause of the state’s housing woes.

Environmental justice groups and their allies have spent years fighting against that argument in the Legislature. Though Prop. 45 does not exempt “essential” projects from environmental review outright — it just shortens and hems in the process — these groups have now lined up to oppose it for much the same reason: They reject the premise that CEQA needs fixing.

But for opponents like Grimes, who supported many recent streamlining bills, the argument that the law is holding up desperately needed residential construction is a year out of date. Last year, the governor signed Assembly Bill 130, a Wicks-authored measure that exempted most infill housing from the CEQA.

Since becoming law in July 2025, developers have used it to entitle 17,913 units of housing, according to the Office of Land Use and Climate Innovation, a state agency.

“When you look at what’s left to do on urban housing, there are absolutely still barriers,” said Grimes, whose organization applauded last year’s exemption. “CEQA just isn't one of them.”

The task of the No on 45 campaign, he said, is to convince enough voters that “we’ve actually solved this problem.”

Are we done here?

Many developers and affordable housing advocates, even those working in urban areas, dispute that CEQA is no longer a major obstacle.

Last year’s exemption does not exempt projects larger than 20 acres, which means supersized urban redevelopment projects are still subject to the old process.

Prop. 45 also applies shot clocks to other permits issued later in the development process and which regularly slow a project more than environmental review.

And while state laws like last year’s infill carveout may grant certain developers the right to ignore CEQA, there is nothing to stop a deep-pocketed opponent from suing anyway. Putting time limits on those lawsuits could be the difference between a project succeeding and being delayed to death, said Mandolini.

She points to the planned 130-unit affordable housing project that Eden Housing has been trying to and failing to build in the Bay Area suburb of Livermore since 2018 as an example. In 2021, a nonprofit funded by a handful of well-heeled Livermore residents sued the city, arguing that it hadn’t done enough environmental analysis on a housing development that would be built on a former grocery store parking lot behind a row of downtown restaurants. A lower court ruled that the group’s CEQA arguments were “almost utterly without merit.” An appellate court agreed. The state Supreme Court allowed that ruling to stand.

But by then two years had passed.

“Every year you lose in litigation is real money for real projects and another year that 130 families don't get to live in that housing,” said Mandolini. “It’s a great way to kill a project.”

Even an infill project.

But among some pro-housing supporters of the proposition, the infill versus sprawl debate isn’t much of a debate at all.

“We’re not an urbanist organization,” said Mahdi Manji with the Inner City Law Center, a legal aid provider and housing advocacy group in Los Angeles’ Skid Row. The group supports Prop. 45 and doesn’t mind the concept of more housing far from the city’s core. “To the extent it results in housing that is a little more affordable in Lancaster and Palmdale, a lot of our clients live out in Lancaster and Palmdale.”

This article was originally published on CalMatters and was republished under the Creative Commons Attribution-NonCommercial-NoDerivatives license.