This July 4th Could Be the Hottest Ever In Parts of U.S.

©iStock/Sabine Hortebusch

This July Fourth could be the hottest on record for millions of Americans as a massive heat wave traps more than half of the United States under a heat dome through the holiday weekend.

Dangerously high temperatures ramped up Wednesday (7/1/26) from the Midwest to the East Coast, forecasters said. Between daily high temperatures and warm overnight lows – which won't be low enough to offer much relief – more than 300 records are expected to be set by Saturday, July 4, 2026.