Dangerous Heat Wave Follows U.S. Summer Storms

The official start of astronomical summer on June 20, 2025, is bringing dangerous heat waves to large portions of the U.S. following severe storms in the Midwest, Mid-South, and Mid-Atlantic. Cities such as St. Louis, Cedar Rapids, and Memphis are under Extreme Heat Watches or Advisories, facing highs in the mid-90s to upper 90s and heat indices exceeding 100 degrees. In the Mid-Atlantic, damaging thunderstorms have caused power outages, but rising temperatures are now the main concern. Central Florida continues to experience scattered storms and high humidity, though rainfall offers some moderation of heat. The heat wave is expected to persist into early next week, with only isolated storms offering limited relief. Authorities urge residents to stay hydrated, limit outdoor activity, and check on vulnerable people and pets.