This undated photo provided by National Transportation Safety Board, The Orange County Fire Authority battles a fire on a burning vehicle inside a garage in Orange County, Calif. When firefighters removed the SUV from the garage to assess the fire , they identified the fuel source as the SUV’s high-voltage battery pack. U.S. safety investigators say electric vehicle fires pose risks to first responders, and manufacturers have inadequate guidelines to keep them safe. (Orange County Sheriff’s Department/National Transportation Safety Board via AP)