Sweltering heat dome to hit US: Here’s when, where it could break records

A major heat dome will push near-record hot, humid weather into the Southeast and Florida starting this weekend and likely lasting into next week.
Highs in the mid-90s to around 100 with heat indexes of 105–115 and little nighttime cooling will make outdoor activities risky.
Over 30 million people face "extreme" heat (another 50 million "major" heat), coming just after the contiguous U.S. logged its hottest July on record.