8 trends tracked about this subject — the full history, oldest to newest below.
Dramatic footage shows a train surrounded by wildfire flames amidst a heat dome and widespread evacuations in the Northwest.
A freight train has been captured on video moving through active wildfires in Northern Ontario amid a record-breaking heat dome.
A persistent heat dome is extending record-breaking temperatures across Western Europe following the region's hottest June on record.
Extreme heat in the eastern US is driving up electricity prices and straining power grids.
A heat dome threatens to make World Cup games in the eastern US unsafe for players and fans.
Five years after a deadly heat dome struck the Pacific Northwest, regional cities and provinces assess their readiness for future extreme heat events.
A deadly heatwave in Europe has led to a surge in drowning deaths in France.
A European heatwave has led to tragic drownings and record temperatures across the continent.