WATCH: Firenado spawns inside Lava Fire burning in Siskiyou County

SISKIYOU COUNTY, Calif. (KGO) -- A fast-moving wildfire burning in the Shasta-Trinity National Forest, near Mt. Shasta and the town of Weed, in Siskiyou County has exploded in size overnight.

The Lava Fire is now burning 13,330 acres, Cal Fire said Tuesday, a jump from 1,446 acres just a day before. The fire is 20% contained.

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A wildfire strike team from Santa Clara Unit has been deployed to help fight the flames, according to Cal Fire.

Lighting is believed to be the cause of the Lava Fire, according to fire officials.

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Evacuation warnings have been issued due to the wildfire along State Route 97, including areas of Angel Valley Rd., Carrick Addition, and Solus Dr.

Take a look at the latest stories and videos about wildfires here in the Bay Area and across California.

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