Heat dome expands across central United States, creating life-threatening conditions

A powerful heat dome has settled over the central United States, trapping scorching air and pushing temperatures well above 100°F across a wide area from the Plains to the Midwest. Meteorologists warn that the combination of extreme heat and high humidity will create dangerous conditions for millions of people, particularly the elderly, children, and those without air conditioning. The heat dome, a weather phenomenon caused by a strong ridge of high pressure, is expected to persist for several days, with little relief overnight. Cities such as Kansas City, St. Louis, and Omaha have opened cooling centers and urged residents to stay hydrated. The National Weather Service has issued excessive heat warnings for parts of at least a dozen states. The event underscores the growing risks of extreme heat as summer temperatures continue to climb due to a warming climate. Officials caution that power grids may be strained as demand for air conditioning surges, and they are monitoring for potential outages. The health impacts could be severe, with heat-related illnesses like heat stroke and dehydration expected to rise. Residents are advised to limit outdoor activity and check on vulnerable neighbors. The heat dome's duration remains uncertain, but forecast models suggest it could expand further eastward later this week.