Daily Mail: Wildfires threatening Los Angeles could plunge the entire city and its 3.8million inhabitants into darkness. A massive blaze in the heavily populated San Fernando Valley broke out on Thursday night, destroying dozens of properties and threatening vital power supply lines. The wind-whipped firestorm swept through bone-dry canyons and hillsides. Hot winds and record temperatures hit in the 90s Fahrenheit (30s Celsius) . Fanned by 70mph winds, the fire has spread over 2,600 …