The heat dome—which is a strong, stationary area of high pressure that acts like a lid, trapping hot air over a region, driving unusually high temperatures—which has dominated western parts of the U.S. for weeks, pushing temperatures well above seasonal averages, is now shifting east in what forecasters describe as a “major change,” according to USA Today . While the West is likely to get some long‑awaited relief from stifling temperatures, as the heat migrates, parts of the central, eastern,