Weather Alerts For South Chelmsford, MA

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY # DETAILS -------------------- WHAT Dangerously hot conditions with heat index values of 100 to 110 degrees expected today. Heat indices of 95-100+ degrees expected on Independence Day. WHERE Portions of northern Connecticut, central, eastern, northeastern, southeastern, and western Massachusetts, and northern and southern Rhode Island. WHEN Until 8 PM EDT Saturday. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. ADDITIONAL DETAILS This is a prolonged and dangerous heatwave with little relief at night. ISSUED AT Friday, July 3, 2026 at 2:59 PM EDT ISSUED BY National Weather Service Boston/Norton MA HEADER URGENT - WEATHER MESSAGE # 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. # AREAS AFFECTED -------------------- Eastern Hampshire MA, Western Kent RI, Western Norfolk MA, Bristol RI, Central Middlesex MA, Eastern Essex MA, Eastern Franklin MA, Eastern Hampden MA, Eastern Kent RI, Eastern Norfolk MA, Eastern Plymouth MA, Hartford CT, Newport RI, Northern Bristol MA, Northern Middlesex MA, Northern Worcester MA, Northwest Providence RI, Southeast Middlesex MA, Southeast Providence RI, Southern Bristol MA, Southern Plymouth MA, Southern Worcester MA, Suffolk MA, Tolland CT, Washington RI, Western Essex MA, Western Franklin MA, Western Hampden MA, Western Hampshire MA, Western Plymouth MA, Windham CT Including the cities of Smithfield, Foster, Chesterfield, Putnam, Foxborough, Union, Warwick, Vernon, West Greenwich, Greenfield, Brockton, Cambridge, Plymouth, Framingham, Mattapoisett, Barre, Boston, New Bedford, Norwood, Fitchburg, Blandford, Gloucester, Ayer, West Warwick, Providence, Northampton, Charlemont, Quincy, Hartford, Coventry, Bristol, Milford, Windsor Locks, Taunton, East Greenwich, Westerly, Newport, Orange, Willimantic, Springfield, Amherst, Worcester, Lawrence, Lowell, Fall River, and Narragansett