Firefighters in California are currently battling 17 wildfires. The largest of them, the Kincade fire, has been burning for 6 days and has destroyed more than 124 structures, with more than 90,000 others at risk, over an area twice the size of San Francisco.

As of Tuesday morning, the Kincade fire had burned almost 75,000 acres and was only 15% contained.

The worst kind of weather for fires—high winds and low humidity—returned to the state Tuesday. Wind gusts of up to 50mph are complicating efforts to control the fires, carrying burning debris outside of the fire line. Millions of residents across the state are without power.

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