Weather Events - Dangerous heatwave to hit USA ahead of holiday weekend -- 1/Jul/2026

A prolonged and dangerous heatwave will intensify across a swathe of the US this week, ushering in scorching daytime heat, high humidity and stifling overnight temperatures, forecasters predict. Some 120 million people, external nationwide are under an extreme heat warning as of Tuesday, as Americans head into the Fourth of July holiday weekend, the National Weather Service (NWS) said. To the north, much of Canada began experiencing its own heatwave on Tuesday, with temperatures up to 37C (99F) expected in Ontario. It comes after Europe's unprecedented early summer heatwave scorched several countries over recent days, with temperature records broken across the continent. #dangerousheatwave #heatwave #heatalert #heatwave2026 #environment #ClimateChange #GlobalWarming Part of the "Weather Events (usually extreme) 2018+" series (on this channel), see play list "Weather Events usually extreme) 2018+" for more. Includes reports, unusual & unseasonal occurrences.