Extreme Heat Warning

Locations Affected

Manchester, NH ∙ Nashua, NH ∙ Swanzey, NH ∙ Springfield, NH ∙ Danbury, NH ∙ Bow, NH ∙ Peterborough, NH ∙ Hill, NH ∙ Pembroke, NH ∙ Croydon Mountain, NH

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Gray ME 308 AM EDT Mon Jun 23 2025 ...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM EDT TUESDAY... * WHAT...Dangerously hot conditions with heat index values up to 107 expected. * WHERE...Western and Central Hillsborough, Merrimack, Sullivan, Cheshire, and Eastern Hillsborough Counties. * WHEN...From 11 AM this morning to 8 PM EDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. 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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Stay cool, stay hydrated, stay informed.

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