Multiple wildfires continued to burn across California on Wednesday as a prolonged heat wave brought dangerous temperatures and high humidity to much of the state.

The Timber Fire, burning in rugged terrain southeast of Big Sur in Monterey County, had scorched 25,380 acres and was 27 percent contained. The fire started August 8 and is being managed with a focus on direct extinguishment where safe, supported by 1,580 personnel. Steep slopes have limited access in many areas.

Nearby, the Plaskett Fire had grown to 29,917 acres and reached 73 percent containment. It began August 26 and involves 1,879 personnel working to secure lines in chaparral and timber fuels. Evacuation orders remained in parts of Monterey County.

In Southern California, the Station Fire near Los Angeles doubled in size overnight to 85,760 acres with only 5 percent containment. Two Los Angeles County firefighters died when their vehicle went off a road south of Acton on Sunday. The fire destroyed additional structures and prompted evacuation orders for thousands of homes.

A new brush fire near the Getty Center in Bel-Air burned about 20 acres Wednesday afternoon, with evacuation warnings issued for nearby zones.

The National Weather Service issued extreme heat warnings for much of Southern California through Thursday evening, with temperatures expected to reach 100 to 108 degrees in valleys and record highs reported in San Luis Obispo and Paso Robles. High humidity made conditions feel even more oppressive, increasing risks of heat-related illness.

Heat advisories covered the Bay Area and Central Coast through Thursday as well, with some locations forecast to hit triple digits. Officials urged residents to limit outdoor activity and check on vulnerable neighbors.

Firefighters across the incidents faced low fuel moisture and challenging terrain, with resources stretched by the ongoing season. Containment estimates for several fires extend into October.