By Miriam Raftery
Photos by Dennis Richardson
Update 7:30 p.m. -- Cause of the fire has been determined to be accidental, due to workers installing a fence.
August 27, 2010 (El Cajon) updated 1:30 p.m. -- Heartland Fire dispatch confirms that a fire that forced evacuation of homes near Grossmont College is now fully contained. No buildings were lost or damaged.
Scroll down for videos provided by a reader.