The Brief

New research is showing that the effects of one of the largest methane gas leaks in U.S. history could reverberate for generations.

Nearly 10 years ago, a Southern California Gas Company storage facility in Aliso Canyon leaked methane for almost four months, spewing years’ worth of planet-heating carbon emissions into the atmosphere and dangerous chemicals into nearby San Fernando Valley communities, including Porter Ranch, Granada Hills and Chatsworth.

A study published Friday in the journal Science Advances found that women who were pregnant at the time of the leak had babies with low birth weights at rates almost 50% higher than normal.

“There are risks to having these large natural gas storage facilities close to major urban populations,” said Michael Jerrett, principal investigator of the UCLA Aliso Canyon Disaster Health Research Study team. “It can translate into substantial health effects that could have lifelong effects.”

Not only did the Aliso Canyon gas storage facility leak the superheating greenhouse gas methane, but it also released chemicals such as benzene, a known carcinogen, and hexanes, which have been linked to low birth weight in other studies, Jerrett said. Heavy metals were also found in some homes downwind.

Research has linked low birth weight to developmental disorders, such as autism and  attention deficit hyperactivity disorder, as well as chronic diseases in adulthood, including diabetes, high blood pressure and some heart diseases, Jerrett said.

The researchers emphasized the low birth weight is not a guarantee of these long-term effects, but that it is “an important overall indicator in public health,” said Kimberly Paul, lead author of the study and assistant professor-in-residence in the department of neurology in the David Geffen School of Medicine at UCLA.

Paul and her team analyzed birth records within and downwind of the leak’s plume and compared them to similar communities in L.A. County during the period of the leak. They found that pregnant women living closest to the leak were more likely to have adverse birth outcomes, but pregnant women living as far as 9 miles downwind also had higher rates of low birth weight.

Researchers grouped study subjects by their distance from the leak. Adverse effects were found up to 9 miles downwind.

(

Science Advances

)

The study also found a likely increase in miscarriages during the leak.

“No matter who we compared the Aliso community to — whether it was these other communities or even women who lived in Aliso before the blowout — we found that the prevalence of low birth weight and term low birth weight was almost 50% higher than expected,” Paul said.

Since the leak, community members near the Aliso Canyon gas storage facility have called for the facility to be shut down, but state officials have pushed a shutdown timeline back, citing the state’s energy needs .

Activists called for the total shutdown of Aliso Canyon after the leak, but it remains open nearly 10 years later.

(

Alex Wong

/

Getty Images

)

“It's important for studies like this to continue so that we better understand what all the risks and benefits of continued reliance on natural gas are for local communities, but also for the broader region of Los Angeles,” Jerrett said.

He and Paul hope the study will help inform policy to better protect public health as the state transitions to cleaner energy sources.

Los Angeles billboard culture is memorable, to say the least.

Our attorney billboards have inspired Hollywood . Creative STD prevention ads have reminded people about safety in weirdly direct ways. Even upside down “ Call Jacob ” and “ hate vegans ” billboards have left a confusing impression.

In a world of drab advertisements, every so often the cream of the crop rises to the top. LAist 89.3’s AirTalk unpacked some of those iconic memories recently. Here’s what listeners shared.

Billboards for music

Billboard for Beatles Abbey Road record circa 1969 on the Sunset Strip.

(

Courtesy Robert Landau

)

Robert Landau, photographer and author of Rock ‘N’ Roll Billboards of the Sunset Strip , has spent years documenting these scenes. He says you have to be clever to plant a seed in drivers’ minds in only a few seconds.

“ We’re such a car-oriented culture that we take this advertising form of billboards and maybe raise it to an art form,” he told host Austin Cross.

One that he remembers vividly is the Beatles’ Abbey Road billboard in 1969.

He said this period was about rock ‘n’ roll music. The bands he listened to were depicted on what he called artistic, almost non-commercial billboards on the Sunset Strip.

“[It created] almost a drive through gallery at that time,” he said.

Tommy Wiseau’s “The Room”

Sam, a listener from Atwater Village, called to share one billboard that lives rent free in his mind.

“ If you traveled in Hollywood on Highland, anytime in the early two thousands,” he said, “you saw the billboard for the Tommy Wiseau movie The Room.”

The billboard was up for years and had little information about what it was actually about. A black-and-white Wiseau stared down passersby next to directions to call a number on the billboard to “RSVP.” (To the movie? A meeting? Who knew.)

It became a sort of local mystery while the movie reached cult-like status .

The Angelyne campaigns

Another one L.A. won’t soon forget is model Angelyne’s plethora of billboards that have dotted the skyline for decades. Yes, decades .

Michael in Studio City said he’s always found the billboard queen entertaining. They’re known for being bright pink and showing Angelyne, usually in a suggestive or sultry pose, alongside just her name.

“I was confused about what necessarily she was going for other than notoriety,” he said.

We could go on forever about L.A.’s hodgepodge of excellent billboards. What’s one that sticks out to you? Send your thoughts to chernandez@laist.com and we may follow up.

This  story was originally published by Boyle Heights Beat on Tuesday.

Residents of Boyle Heights and East Los Angeles are invited to join Metro’s community working group to provide input on a series of projects aimed at decreasing pollution and improving streets for pedestrians and cyclists.

The effort is part of the Long Beach-East Los Angeles Corridor Mobility Investment Plan, a $4 billion initiative that includes more than 200 projects and 15 programs that prioritize transit, walking, biking, safety and cleaner air.

It spans 18 cities and three unincorporated communities from Long Beach to East LA along the I-710 corridor. The plan includes an initial $743 million from the previously canceled I-710 freeway expansion project.

Who can join

The working group will be made up of 30 people who will represent their community by serving a two-year term. Working group members may be eligible for compensation at a rate of $150 per meeting, earning up to $4,300 per Metro fiscal year, according to Metro .

“We want residents, community members, family members, students, mothers, fathers, grandmas that can come and represent their community … to help us set the priorities,” said Patrick Chandler, a Metro spokesperson.

Chandler said the hope is working group members then can inform their neighbors, “so they are aware of what their concerns are.”

“We know that especially for Boyle Heights, with the East LA interchange … we want to go in a direction that is equitable, that is community driven,” he added.

How to apply

Applications are due Nov. 14 and can be completed online in Spanish or English . To request a paper application, you can email 710corridor@metro.net. Selected members will be notified in December.

Frequently asked questions about the project are available in English and Spanish . To learn more, visit: metro.net/lb-ela-cp-hub.

Long Beach leaders broke ground Monday on a $6 million project to give new life to an undeveloped acre in North Long Beach.

The 51st Street Greenbelt Project will turn a stretch of land on De Forest Avenue between 51st and 52nd Streets into a park featuring pedestrian and cycling paths, fitness equipment, play structures, native plants and green infrastructure.

The greenbelt, which is part of Long Beach’s infrastructure investment plan , is scheduled to be completed by fall 2026, the project manager said. In recent years, the city has expanded recreational space in the lower Los Angeles River region by dozens of acres. This project represents the latest effort to create more green space in the area.

During Monday’s groundbreaking ceremony, Rep. Nanette Diaz Barragán, whose Congressional district includes North Long Beach, stepped up to the mic next to a large pile of dirt. “When I was a kid, I didn’t have a park nearby,” she said. “I had to get on a bus to go play Little League and baseball.”

Barragán’s commitment to broadening access to outdoor recreational space, especially for park-deficient neighborhoods in Long Beach, helped secure millions in federal funding for the project.

The city will combine those dollars with grants and city funds to build a park that addresses the community’s needs, identified through surveys and meetings, said Councilmember Tunua Thrash-Ntuk, who represents the 8th City Council District.

Three men walk along the 51st Street Greenbelt project with blueprints in hand after the groundbreaking of the park in Long Beach on Monday, Nov. 10, 2025.

(

Thomas R. Cordova

)

Thrash-Ntuk said the park is intended to serve neighbors of all ages — especially children, as the lot sits near several schools. “Today, I’m pleased to say that one of the district residents that I brought with me is an avid user of local parks, and that’s my son,” she said.

The greenbelt aims to improve community physical, mental and environmental health, said Stephen Scott, acting director of the Department of Parks, Recreation and Marine. The census tract where the park will be built is among the 5% most environmentally burdened and vulnerable areas in the state, according to CalEnviroScreen , a tool developed by the California Office of Environmental Health Hazard Assessment.

The Long Beach Climate Action Plan acknowledges that due to “long-standing discriminatory practices,” low-income communities and communities of color in Long Beach are more likely to live in heavily polluted, climate-vulnerable areas without access to parks.

Congresswoman Nanette Barragán speaks at the groundbreaking for the 51st Street Greenbelt project in Long Beach, Monday, Nov. 10, 2025.

(

Thomas R. Cordova

)

Project manager Tina Cheng said the greenbelt will mitigate some of these issues with new and existing vegetation. The site already has mature, native trees — oaks and sycamores. “We’re lucky to have them, because they’re huge,” said Mina Roades, a landscape architect with design studio City Fabrick. “Otherwise, this would be a park with a bunch of little sticks.”

The site currently captures its own stormwater, Roades said; “We’re enhancing it with a bioswale,” a vegetated channel that treats and controls stormwater, she added.

Though ground officially broke Monday, “This work has been underway for a couple of years,” said Joshua Hickman, acting director of Public Works. His team has already completed work on the hardscape — the curb, gutter and sidewalk — to improve accessibility to the eventual park. Once the project is complete, the Public Works team will restore the pavement — and parking — adjacent to the greenbelt, an effort to create a space that “integrates seamlessly with all of the neighborhood,” Hickman said.

Mayor Rex Richardson speaks at a groundbreaking pf the 51st Street Greenbelt project in Long Beach, Monday, Nov. 10, 2025.

(

Thomas R. Cordova

)

“I can’t say how proud I am as a North Long Beach resident to see this project move forward,” said Mayor Rex Richardson. He joined a line of city officials, who donned hard hats and tossed shovelfuls of dirt into the air.