CHICO, California. – Flash flooding and mudslides are possible over the Park Fire scar to the north due to moderate to heavy rainfall. California until Saturday morning.

Videos from the park fire in California show strong flames and thick smoke as emergency crews try to extinguish the fire

Flash flooding and mudslides due to moderate to heavy rainfall are possible over the Park Fire burn scar in Northern California through Saturday morning.

(CAL FIRE Tehama Glenn Unit/Tehama County Fire Department)

The National Weather Service in Sacramento has issued a flash flood warning for the areas affected by the wildfire. As of Friday morning, the fire has burned more than 423,000 acres and continues to advance with 63% containment. The cause of the fire has been determined to be arson, according to CAL Fire.

“Residents near the Park Fire burn scar should prepare for possible flooding,” the weather office warned.

Isolated showers and thunderstorms are expected, which may cause debris flows of rock, mud, vegetation and loose material. Residents in the area should be prepared to evacuate if instructed to do so by local authorities.

On July 24, the Park Fire broke out near Bidwell Municipal Park east of Chico and spread quickly with extreme fire development.

Dramatic images from the park fire in California show heroic firefighters risking their lives to extinguish a historic blaze

The fire has now spread deeper into Lassen National Forest and onto private, state and other federal lands. Based on area burned, the fire has climbed to the fourth largest wildfire in California history and is moving closer to third.

According to CAL Fire, more than 630 buildings, including homes and businesses, were destroyed by the fire, and nearly 50 others were damaged.