Updated

A persistent heat dome has settled over the Mid-Atlantic and Southeast, pushing temperatures into the low 90s in areas like Knoxville, Tennessee, with the Climate Prediction Center forecasting most of the lower 48 states to trend warmer than normal through September 29. Spotty afternoon thundershowers have offered only brief relief, with slightly cooler 80s expected early next week in some areas. The sustained heat prompted local relief efforts, including Vestal United Methodist Church opening as a cooling center in the Knoxville area on September 15 to help residents cope with temperatures back in the 90s. Forecasters say the heat pattern reflects a broader nationwide trend rather than an isolated regional event.