A fast-moving blaze that has burned for nearly two weeks in Northern California was started by an improperly installed electric livestock fence, fire officials said.
Several wildfires are scorching the western United States and forcing hundreds to evacuate from their homes, with one person killed in a blaze near California's border with Oregon.
As the heat wave that has left at least three dozen people dead in Canada, the northeast US and Kansas recedes, heat is building in the western US and is likely to add to wildfire concerns.