Overview
- The National Weather Service has extended a heat advisory across Orange County inland, the Inland Empire, and San Diego valleys and mountains through 8 p.m. Wednesday.
- An extreme heat warning is in effect for Death Valley National Park and the Mojave Desert until 10 p.m. Thursday, with Las Vegas Valley expected to hit as high as 113°F.
- Palm Springs could reach 118°F on Wednesday and numerous inland cities from Palmdale to San Bernardino are forecast to exceed 100°F.
- A stagnant high-pressure system over Southern California is driving record inland highs, lowering humidity and contributing to gusty winds.
- Officials warn of elevated grass fire danger and urge residents to stay hydrated, avoid direct sun exposure, and check on vulnerable neighbors.