A triple-digit heat wave arrives in Southern California on Wednesday, affecting inland communities, increasing health ...

Big changes [are] coming ... as high pressure over Arizona expands west into Southern California,' the weather service warns.

‘Mini heat wave’ descends on Southern California Katie Torres cool off her son Augustine Torres in the splash pool at La Pintoresca Park in Pasadena on Wednesday, July 9, 2025.

Southern California was feeling the effects of a mini heat wave, with temperatures expected to climb about 5 to 10 degrees above area norms Wednesday and Thursday.

UCLA researchers have released an alarming new finding — the duration of heat waves is increasing faster than global warming ...

A moderately strong heat wave is taking shape inland, but its reach will be uneven and the coast may barely feel it at all.