The United States is facing one of its hottest summers on record as ‘searing heatwaves’ push thermometers widely into the 100Fs. Raging temperatures, however, threaten to stir up an unusually powerful autumn of hurricanes, experts warn. A ‘summer of heatwaves’ and ‘juiced hurricane season’ will prolong the misery across America as it battles a deadly tornado assault. Weather Channel spokesman Chris DeWeese said: “Searing heat waves could be a common theme this summer in parts of the United States, and this could make it one of the hottest summers on record. “The first tropical storm in the Wes…