The first big heat wave of 2025 has arrived, coinciding with the official start of summer.
More than 40 million people in the United States were under heat alerts Friday, according to the National Weather Service. Temperatures in the Midwest are expected to crest well into the 90s Fahrenheit (30s Celsius) this weekend. Triple-digit highs could pop up in New York, Philadelphia, Washington and Denver. The peak will likely hit the East Coast early next week.
