During a heat wave, much attention is paid to extremely high temperatures during the daytime, but it’s the warm overnight lows that can be really dangerous. Many think they'll get some relief as the ...

Temperatures are scorching, and they probably haven’t peaked yet. By David Gelles Across the Northern Hemisphere, searing temperatures are breaking records, disrupting everyday life and costing lives.

Australia has always had heat waves. But this week's heat wave in southeastern Australia is something else. Temperatures in some inland towns in South Australia, New South Wales and Victoria were up ...