AP Photo/Jeff Chiu
A massive fire roars through a mostly residential neighborhood in San Bruno, Calif., Thursday, Sept. 9, 2010. Fire crews flooded the ruins of burning homes with water early Friday after a massive explosion sent flames roaring through the San Francisco suburb, killing at least four people, injuring many others and destroying more than 50 houses.
AP Photo/George Nikitin
A fire fighting helicopter flys over a massive fire, Thursday, Sept. 9, 2010 in San Bruno, Calif. Utility officials said a gas line ruptured in the vicinity of the blast, which left a giant crater and sent flames tearing across several suburban blocks in San Bruno just after 6 p.m.
AP Photo/George Nikitin
Firefighters fight a massive fire in a residential neighborhood in San Bruno, Calif., Thursday, Sept. 9, 2010. More than 50 homes were destroyed, and at least one person was killed.
AP Photo/George Nikitin
Emergency workers walk through a fire-ravaged residential neighborhood, Thursday, Sept. 9, 2010, in San Bruno, Calif. More than 50 homes were completely destroyed during the massive fire.
AP Photo/Paul Sakuma
A massive fire roars through a mostly residential neighborhood in San Bruno, Calif., Thursday, Sept. 9, 2010. A massive fire burned homes as it roared through a mostly residential neighborhood in the hills south of San Francisco following a loud explosion Thursday evening that shot a fireball more than 1,000 feet into the air and sent frightened residents fleeing for safety, witnesses said.
AP Photo/Mike Adaskaveg
A woman is treated by firemen after an explosion in San Bruno, Calif., Thursday, Sept. 9, 2010. More than 50 homes were destroyed when a massive fire roared through a mostly residential neighborhood in San Bruno.
AP Photo/Paul Sakuma
Cars and homes destroyed after a massive fire that roared through a mostly residential neighborhood in San Bruno, Calif., Thursday, Sept. 9, 2010.
AP Photo/Paul Sakuma
Firefighters race to massive fire that roared through a mostly residential neighborhood in San Bruno, Calif., Thursday, Sept. 9, 2010.
AP Photo/Paul Sakuma
A home for sale sign is shown in front of home that was destroyed after a massive fire that roared through a mostly residential neighborhood in San Bruno, Calif., Thursday, Sept. 9, 2010.
AP Photo/Paul Sakuma
A vehicle and home destroyed after a massive fire that roared through a mostly residential neighborhood in San Bruno, Calif., Thursday, Sept. 9, 2010.
AP Photo/Jeff Chiu
Police and fire officials meet at an area where evacuees gathered after a massive fire damaged a mostly residential neighborhood in San Bruno, Calif., Thursday, Sept. 9, 2010.
AP Photo/Mike Adaskaveg
Firemen are seen outside burning homes after an explosion in San Bruno, Calif., Thursday, Sept. 9, 2010. More than 50 homes were destroyed when a massive fire roared through a mostly residential neighborhood in San Bruno.
AP Photo/Jeff Chiu
Jaime Molina, right, puts a blanket around his daughter Jazmin, 6, as his wife, Esmeralda, left, and their son Danny, 4, foreground, wait in an area where evacuees gathered after a massive fire damaged a mostly residential neighborhood in San Bruno, Calif., Thursday, Sept. 9, 2010.
AP Photo/Jeff Chiu
Evacuees gather on a bus for a briefing by police and fire officials after a massive fire damaged a mostly residential neighborhood in San Bruno, Calif., Thursday, Sept. 9, 2010.