Extreme Heat Warning

Locations Affected

Boston, MA ∙ Providence, RI ∙ Springfield, MA ∙ Worcester, MA ∙ Hartford, CT ∙ Cambridge, MA ∙ Lowell, MA ∙ Cranston, RI ∙ Quincy, MA ∙ Lynn, MA

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 138 AM EDT Tue Jun 30 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM WEDNESDAY TO 8 PM EDT SATURDAY... * WHAT...Dangerously hot conditions with afternoon heat index values of 98 to 112 degrees expected Wednesday through Saturday afternoons. Currently...Thursday and Friday look to be the worst of the heat and humidity but regardless this will be a prolonged and dangerous heatwave. * WHERE...This extreme heat warning includes all of southern New England except the Berkshires and south coasts of Massachusetts and Rhode Island...where the watch extreme heat watch remains in place. * WHEN...From 10 AM Wednesday to 8 PM EDT Saturday. THe worst of the heat and humidity looks to be Thursday and Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...This will be a prolonged and dangerous heatwave with little relief at night! Low temperatures will only be dropping into the lower to middle 70s. In fact...the urban heat island of Boston will only see low temperatures drop into the upper 70s to near 80! PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

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