Boston, MA: During periods of extreme heat the City of Boston declares a heat emergency and open community centers as cooling centers. Please check on your neighbors and the elderly to make sure they’re okay.
- Heat Wave: Three or more days of temperatures above 90 degrees Fahrenheit.
- Excessive Heat Warning: Daytime highs of more than 105 degrees Fahrenheit for two or more hours.
- Heat Advisory: Daytime highs of 100 – 104 degrees Fahrenheit for two or more hours.
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