VIDEO: Firenado and Fierce Fires Advance from San Marcos Toward Escondido

Wildfires spread rapidly in California forcing thousands to evacuate. CNN’s Gary Tuchman reports.

Escondido residents in neighborhoods north and west of West Valley Parkway between Via Rancho Parkway and Highway 78 were given evacuation orders as two flanks of the Cocos wildfire spread east along the hillsides overlooking the city.

Firefighters struggle to contain wildfires from the that are encroaching on neighborhoods and schools.

Arson and bomb investigators are working to determine what caused the devastating San Diego County wildfires, and several people were interviewed at the scene of the Lakeside fire near Aurora Drive when it started just after 5 p.m. Wednesday.

The Cocos fire began near Cocos Drive about 3:45 p.m. Thursday.

Authorities have urged citizens to call local the police if they have seen any suspicious activity. San Diego County Sheriff Bill Gore said “nothing is too small” to report.

In the satellite view above, the fire advanced across the hill from west to east and threatened the Cul de Sac at

Cocos Fire in San Marcos at Paseo Tierra and Via del Campo …

Fire at 6:43 p.m. Wednesday May 14, 2014 in San Marcos, California.

An alert on Twitter from North County Fire Protection District serving the communities of Fallbrook, Bonsall and Rainbow, California …

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