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.

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 wave continues thru early next week with a slight cool down middle of the week as daily record high temperatures overlaps with Gulf moisture. Isolated T-storms are possible in afternoon/evening for Thurs, mainly over western counties. We warm back up by the end of the week. pic.twitter.com/KOHSEFq8l5

Some clownfish off the coast of Papua New Guinea shrank their bodies during a marine heat wave — and the smaller fish were more likely to survive, according to a new study.

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.

After a springtime of breezy, cool mornings and dry air, a heat wave hit Austin like a train last week. Those triple-digit highs and thick humid days are likely a taste of things to come, as Central Texas moves closer to what are typically its hottest months of the year.