Information and resources to help prepare for extreme heat events
What is extreme heat?
Extreme heat is a prolonged period of very hot weather, which may include high humidity. In Massachusetts, a "heat wave" is usually defined as a period of three or more consecutive days above 90 °F.
Massachusetts Unhealthy Heat Forecast
Use this tool to see the 7-day heat forecast for Massachusetts. You can also select your city or town using the dropdown menu. The chart shows today’s temperature, the hottest day coming up, and a color-coded forecast for each day.