Investigators are examining multiple potential causes behind the devastating California wildfires that ... The National Fire Protection Association identifies lightning as the most common cause ...

While lightning is the most common source of fires in the U.S., according to the National Fire Protection Association, investigators ... large fires in California including the Oakland Hills ...

While lightning is the most common source of fires in the U.S., according to the National Fire Protection Association ... ambulances during California wildfiresThe 2017 Thomas Fire, one of the largest ...