Several countries across Europe have shattered temperature records as a deadly heat wave puts over 150 million people under extreme heat advisories. Germany, Hungary, Czechia, Poland and Denmark have all set records for their highest-ever recorded temperatures. French authorities report more than 1,000 excess deaths due to the heat, with the mortality rate expected to rise even further.

Here in the U.S., three firefighters were killed along the Colorado-Utah border over the weekend as they battled blazes that have scorched nearly 30,000 acres. They’re among three dozen major wildfires burning across the U.S., as forecasters warn central and eastern states face dangerous and potentially record-breaking heat over the July Fourth holiday.