In already the worst wildfire season in California history, the state marked another grim milestone on Sunday when it surpassed 4 million acres burned, more than doubling the previous single-year record set in 2018.

"We are dwarfing that previous record, and we have a lot of season left to go," said Chief Thom Porter, director of the California Department of Forestry and Fire Protection, also known as Cal Fire.

On Saturday, the state was about 245,000 acres short of 4 million acres burned. But on Sunday morning, Cal Fire reported that the total number of acres burned had surpassed the 4 million mark, more than double the 1.54 million acres burned in 2018.

Firefighters have battled at least 8,136 different fires across the state, most occurring since mid-August. The fires have claimed at least 31 lives and destroyed more than 4,600 residential and commercial structures, according to Cal Fire.

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