Starting Wednesday, temperatures are expected to be in the high 90s and low 100s in inland areas. Officials say now is the time to prepare.

A dangerous, multiday heat wave descended on much of California and the U.S. Southwest, with near-record temperatures expected along with a higher risk of wildfires. Officials opened cooling centers this week in Los Angeles,

The report, released this week, found that 58% of fast-food workers surveyed in July said they had worked in excessive heat conditions in the last year. And nearly half, or 48%, reported experiencing heat illness symptoms including headaches, fatigue, dizziness, confusion, muscle pain or nausea.

The National Weather Service issued extreme heat and red flag warnings for parts of Ventura County. Here's what to know.

The buildup is over; Wednesday is the day that triple-digit temperatures and dangerous fire conditions spread across much of Southern California. KTLA's Vera Jimenez and Kimberly Cheng report on Aug.

Temperatures across interior Southern California will climb dramatically over the next few days, as a prolonged, dangerous heat wave begins Wednesday and could persist into next week.