The National Weather Service said low humidity and wind gusts up to 45 mph over ridgelines in the Sierra Nevada could help spark flames, but those conditions were expected to subside Thursday and Friday.
The powerful wind gusts were allowing embers from the blaze to travel about a mile, causing new small fires to spark and spreading resources thin. At times, the gusts and conditions were allowing the fire to move at 200 feet a minute as the blaze hopped from treetop to treetop.