Methane gas has been leaking from a storage facility in California’s Aliso Canyon since October 2015 at a rate of 110,000 pounds per hour. You can see the plume in this infrared video shot on December 17, 2015. So far, 1,700 homes have been evacuated. The Southern California Gas Company thinks it will be able to stop the leak “by late February or late March.”
Source: Boing Boing