Crews are urging hikers to hydrate as record-breaking winter temperatures trigger an early activation of Phoenix heat ...

Temperatures across California and the West have set records all week, an ominous sign, experts say ...

Southern California's heat wave tied or broke 30 daily heat records on Wednesday with the worst heat yet to come, according ...

The increasingly sparse snow pack is getting whacked by what can only be described as an unseasonable mountain heat wave. The ...

The season's most dangerous heat wave is expected to bake Southern California and much of the American Southwest this week, with triple-digit highs and elevated fire conditions set to begin Wednesday ...

A record-setting marine heat wave stripped huge portions of Florida's coral reef of their colors in 2023, triggering the ninth and worst mass bleaching event in the Caribbean. Temperatures soared for ...

During this heat wave, "not only are daily temperature records likely to be broken across the region, but even the high temperature records for any day in the entire month of March," the National ...

More than 30 million people are under extreme weather alerts Sunday as a sweltering heat wave lingers across the West. Excessive heat warnings and watches were effective in parts of California, Oregon ...