Presumed cause of the Los Angeles fires

US investigators believe that a power line, which can withstand wind speeds of up to 90km/h, was outdone at 150km/h, causing the line to fall and sparks to fly. Fires continue to devastate parts of Los Angeles, including the upscale Pacific Palisades district, where dozens of victims have been reported. Authorities are trying to determine the cause of the fires and, while they're not ruling out the possibility of arson, one theory that is...