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A man walks past the remains of homes damaged from a fire caused by an explosion in a mostly residential area in San Bruno, Calif. Officials survey damage from a fire caused by an explosion in a mostly residential area in San Bruno, Calif., Monday, Sept. 13, 20 Boxes of donated items are shown at an evacuation area for residents affected by a fire caused by an explosion in a mostly residen Damage to the roof of a home is shown as emergency workers survey damage from a fire caused by an explosion in a mostly residentia Emergency workers survey damage from a fire caused by an explosion in a mostly residential area in San Bruno, Calif., Monday, Sept A worker looks over damage from a fire caused by an explosion in a mostly residential area in San Bruno, Calif., Monday, Sept. 13, Line workers work to restore power at the site of a gas pipeline explosion in San Bruno, Calif., Monday, Sept. 13, 2010. (AP Photo A house burned down by a gas pipeline explosion is inspected in San Bruno, Calif., Monday, Sept. 13, 2010. Investigators are sti Residents aboard a school bus are given a tour of a burned down neighborhood damaged by a gas pipeline explosion in San Bruno, Cal