Officials in San Bernardino County, California, issued an evacuation after a brush fire spread to over 7,000 acres.

The small community of Running Springs has been ordered to evacuate because of the Line Fire, while Lake Arrowhead and areas to its west are under an evacuation warning.

Some Southern California residents were forced from their homes Saturday after an explosive wildfire grew by more than 3,000 acres in mere hours – and is burning so intensely that it is creating its own weather.

The massive Line Fire exploded to 17,459 acres Sunday in Southern California's San Bernardino County, threatening thousands of structures and bringing expanded mandatory evacuation orders.

The Line Fire more than quadrupled in size on Saturday and led to evacuation orders for more than 5,000 people. A heat wave raises the risk that more fires could start.

More than 35,000 structures were being threatened Sunday by an out-of-control wildfire in Southern California that has prompted evacuation orders and an emergency declaration by the governor, officials said.

The fast-growing wildfire in San Bernadino County the south of the state is threatening communities, prompting the governor's declaration.

An uncontrolled wildfire in the San Bernardino National Forest forced mandatory evacuations in Running Springs and Arrowbear Lake.

Officials issued evacuation notices in eastern San Bernardino County on Saturday due to the Line Fire, which consumed more than 7,000 acres. More than 500 personnel are working to contain the flames,

More than 500 homes are under a mandatory evacuation order in the city of Highland due to the growing Line Fire.