Communities across the U.S. experienced unprecedented warmth in 2024, with numerous cities breaking temperature records set just a year earlier. Phoenix recorded an average temperature of 90.5F and endured 70 days with highs at or above 110F, surpassing its previous record of 55 days.

Major metropolitan areas including Chicago, Nashville, Washington, Pittsburgh, Philadelphia, and Burlington, Vermont, all registered their warmest year. Even northern Maine cities like Caribou and Houlton saw record-breaking temperatures, reflecting broader global warming trends that made 2024 the hottest year on record worldwide.