Heat Advisory is in effect from noon today through 8 PM Friday for much of southern New England away from the ocean influence. Heat index values near or above 100°F are possible. Stay hydrated, limit strenuous afternoon activity, use A/C, and wear light-colored clothing.
ALT Graphic from the National Weather Service Boston announcing a Heat Advisory in effect from noon today through 8 PM Friday with a “Heat Risk: Major” designation. The advisory area is shaded orange across much of southern New England away from the ocean influence, including interior portions of Massachusetts, Connecticut, Rhode Island, southern New Hampshire, and nearby areas. The graphic states heat index values near or just above 100°F are possible. Potential impacts include hot temperatures, high humidity, and little overnight relief Thursday, increasing the risk of heat illnesses. Safety actions shown with icons advise people to stay hydrated, limit strenuous outdoor activity during the afternoon, use air conditioning if available (fans may not be adequate), and wear lightweight, light-colored clothing. Graphic branded National Weather Service – Boston, updated June 11, 2026.