As the White House warns of rising temperatures and far-reaching effects of climate change, millions throughout the Southeast and Plains are in the grip of high temperatures pushing toward triple digits.
Records are in danger Wednesday from Lincoln, Neb., to Charleston, S.C. Many cities will see highs in the mid-90s.
High temperatures combined with low humidity and strong winds gusts will keep a threat of wildfires alive through the day. Any fire that develops in these conditions can spread rapidly and will be difficult to control.
Highs should moderate into the 80s by Thursday with the coming of a cold front, but that front could also trigger severe storms.