Boston, Massachusetts – Relentless summer heat will blanket Massachusetts on Wednesday, July 30th, sending heat indices soaring to dangerous levels in Boston and across much of the state. Temperatures will climb into the upper 90s, with the heat index expected to peak near 101° by late afternoon — making outdoor activity risky for everyone.
According to the National Weather Service, a Heat Advisory remains in effect for Boston and surrounding counties, including the I-90 and I-95 corridors, until 8 PM Wednesday. Hot temperatures and high humidity will increase the risk of heat exhaustion and heat stroke, especially for vulnerable residents. City officials urge everyone to drink extra fluids, seek air conditioning, and check on neighbors, particularly seniors or those without adequate cooling. Avoid strenuous tasks outdoors and consider rescheduling activities until evening.
Transit agencies and utility providers are monitoring the situation, with Boston EMS reporting a higher volume of heat-related calls. Cooling centers are open across Suffolk and Middlesex counties. Motorists on I-90 and I-95 should watch for heat-related pavement issues and stay alert for emergency crews responding to overheating vehicles.
Thunderstorms are possible late Wednesday, with scattered showers expected to break the heat by Thursday afternoon. Looking ahead, Friday, August 1st, will see cooler highs near 73°, with occasional showers likely. The weekend brings drier air and milder temperatures for outdoor plans, with sunny skies forecast Sunday and Monday.
Five-Day Forecast for Boston (Wednesday, July 30th – Monday, August 4th):
- Wednesday: Sunny and hot, high near 98°. Heat index up to 101°. Slight chance of late storms.
- Thursday: Chance of showers and thunderstorms, high near 77°.
- Friday: Showers taper off, high near 73°.
- Saturday: Partly sunny, high 78°, less humid.
- Sunday & Monday: Mostly sunny, highs in mid-80s, calm winds.
Stay tuned for updates as conditions may change. Heat advisories remain in effect until 8 PM Wednesday, July 30th.
