Support for LAist comes from
We Explain L.A.
Stay Connected

Share This

Climate and Environment

LA And OC Will Feel Significant Temperature Increases From Climate Change

A map shows deep red on the west and southern U.S.
Heat projections are mapped for monthly max temperatures.
(Courtesy First Street Foundation)
We need to hear from you.
Today during our spring member drive, put a dollar value on the trustworthy reporting you rely on all year long. The local news you read here every day is crafted for you, but right now, we need your help to keep it going. In these uncertain times, your support is even more important. We can't hold those in power accountable and uplift voices from the community without your partnership. Thank you.

With climate change happening in real time, researchers have created projections of how much warmer temperatures will get throughout the country over the next 30 years.

In California, some of the areas that will be hit the hardest by rising temperatures include Los Angeles, Orange and Riverside Counties.

Research group First Street Foundation, which developed the extreme heat map, compared the number of very hot days expected in 2023 to the number expected in 2053. Orange County and L.A. County are predicted to experience the worst and the third-worst increases in the state, respectively.

Orange County’s hottest days are expected to go up by 214.3% by 2053; L.A. County, by 200%.

Support for LAist comes from

In O.C., that means the number of days that temperatures reach or exceed 90 degrees will jump from seven to 22.

Riverside County, meanwhile, is expected to see the number of days that temperatures reach or exceed 100 degrees increase from 39 in 2023 to 55 in 2053.

Some cooling effects from the Pacific Ocean are expected to take the edge off; in other words, it could be worse. Still, Jeremy Porter, a chief research officer with First Street Foundation, said that you won’t have to go very far inland to feel the heat.

“It doesn't take much in the way of spatial distance from the coast before you start to see an increase,” he said.

Climate Emergency Questions
Fires. Mudslides. Heat waves. What questions do you need answered as you prepare for the effects of the climate emergency?

Most Read