Heat will bear down on Texas and the Great Plains within days, driving temperatures in Dallas above the 100-degree mark for the first time this year. A dome of high pressure will build across the middle of the U.S., boosting demand for power to run air conditioners, said Jim Rouiller, lead meteorologist at the Energy Weather Group. The heat will expand eastward later next week into Chicago while a blanket of humidity will make it feel like 100 Fahrenheit (38 Celsius) from New York to Washington. For Texans, “next week will be the hottest week they have had all summer long,” Rouiller said. “Cooling demand will be the highest we have seen all summer.” The Lone Star state’s grid manager warned Thursday that electricity […]