The Caldor Fire in El Dorado County exploded from 6,500 acres Tuesday to more than 53,000 acres by Wednesday morning, officials said, scorching parts of Grizzly Flats as firefighters ordered thousands to evacuate.

Fire officials said the dire wildfire season, on track to break records set last year, has strained their resources as they respond to about 100 blazes nationally. More than 240 firefighters were battling the Caldor Fire, which kindled Saturday in a remote area and was completely uncontained. Out-of-state assistance also was requested to help fight the flames. Read more: https://wapo.st/2Wn1kEa. Subscribe to The Washington Post on YouTube: https://wapo.st/2QOdcqK

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