A boat moves along Lake Oroville as the Thompson fire continues to burn in Oroville, California on Thursday. A heatwave is sending temperatures soaring resulting in red flag fire warnings throughout the state. Thousands of people have been ordered to evacuate as a wildfire rages out of control in northern California, with a swathe of the United States in the grip of a ‘record-breaking and dangerous’ heatwave that was complicating firefighting efforts. AFP