Southern California is baking under a powerful heat wave this week, prompting urgent warnings for more than 8 million people to limit time outdoors and stay cool. The National Weather Service (NWS) extended its heat advisory through 9 p.

Much of Southern California has been placed under a heat advisory Tuesday as the first of a dayslong heatwave arrives. Henry DiCarlo has KTLA's forecast on Tuesday, May 20, 2025.

Some relief from the heat is expected Thursday, but not much, with temperatures reaching the mid 90s in the valleys and triple digits in the Coachella Valley. The high in the valleys and Inland Empire will be 96 Thursday,

Heat cramps, painful muscle cramps and spasms, usually in the legs and abdomen, may also be a symptom of heat exhaustion. Apply firm pressure on cramping muscles or gently massage to relieve spasms. Give sips of water unless the person complains of nausea, then stop giving water.

Heat waves destroy crops, drive wildfires, and kill humans and wildlife, but these extreme weather events aren't just limited to land. Large bodies of water can also be hit by heat waves that linger for weeks,

The adaptation appears to help the fish cope with high temperatures, since individuals and breeding pairs that shrank improved their survival odds

Supreme Court notice seeks Centre's response on petition addressing escalating heat wave crisis and climate change impacts.

Rising temperatures in Pakistan's most populous province have forced the provincial government to close all private and public schools for summer vacations early, officials said on Tuesday.