Nearly every corner of the Lower 48 is dealing with some sort of wild weather, with fires, floods, tornadoes and a punishing heat wave all wreaking havoc .Floodwaters have swept away homes, whole bridges and chunks of road, and 100 million Americans have been placed under heatwave warnings to stay at home, as the United States is hit with a surge of extreme weather events over just two days.

Torrential rain and a melting snowpack triggered the deluge that forced the evacuation of some parts of Yellowstone National Park, cutting off electricity and forcing the rare closure of all five entrances indefinitely, just as the summer tourist season kicked off.

There were no immediate reports of injuries, though dozens of stranded campers had to be rescued by raft in south-central Montana.

"This is flooding that we've just never seen in our lifetimes before," said Cory Mottice, a meteorologist with the National Weather Service in Billings, Montana.

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