Extreme Conditions Expected as Firefighters Battle California Blazes

Firefighters on a structure protection team watch a plume of smoke grow from the Ranch Fire (Mendocino Complex) in the hills north of Upper Lake, California, U.S. Aug. 1, 2018. Reuters/Fred Greaves

REDDING, Calif.—Extreme weather conditions are expected to return on Thursday and could stoke wildfires in California where thousands of weary firefighters are battling the destructive and deadly blazes.