A widespread and dangerous heat wave is building across the U.S., with triple-digit highs expected in the Southwest and Great Plains this weekend before spreading eastward under a dome of high pressure that meteorologists say could trap oppressive temperatures for a week or more.Forecasters are advising people to stay hydrated and find places to cool off, warning of temperatures 15 to 25 degrees Fahrenheit (8 to 14 degrees Celsius) warmer than normal in many areas, including at night — especially bad for people’s health because their bodies won’t have a chance to recover. The heat dome is expected to affect as much as two-thirds of the continental United States.“The heat doesn’t necessarily stop when it’s dark out,” said Josh Adam, a meteorologist with the National Weather Service in Bismarck, North Dakota, where temperatures will surpass 100 F (37 C) until Tuesday. That is a dramatic spike for a state where summer temperatures are typically in the 80s, he said.
Temperature records will be brokenThe National Weather Service predicts that more than 90 U.S. local temperature records will be tied or broken through Wednesday — with two-thirds of those being overnight heat records. Temperatures won’t drop below 80 F (27 C) at night in Fort Lauderdale, Florida; Miami; Tampa, Florida; Galveston, Texas; and Charleston, South Carolina, according to the forecast.
