News Summary
Boston has set a new record for the hottest June day ever, with temperatures soaring to 102 degrees Fahrenheit. This extreme heat, leading to a heat emergency declaration by Mayor Michelle Wu, has prompted public health warnings and increased emergency calls. The city has also implemented special cooling measures at venues like Fenway Park to help residents cope with the heat. A slight respite is expected with forecasted lower temperatures later in the week, but additional warm days are anticipated throughout the summer.
Boston has set a new record for the hottest June day ever, reaching an unprecedented high of 102 degrees Fahrenheit on Tuesday, a day marked by an extreme heat warning from the National Weather Service for Boston and much of Massachusetts. This also marks the first official heat wave of 2025. The intense heat has prompted Boston Mayor Michelle Wu to declare a heat emergency in the city, effective through Tuesday.
This June has been particularly warm, with Boston’s average temperature since June 1st recorded at 71.3 degrees Fahrenheit, which is 1.1 degrees above the 30-year average. In fact, Boston has already experienced 10 days of 90-degree temperatures this summer, a number that is 2.5 times higher than the city’s 30-year average of four days. Currently, this summer ranks as the 23rd warmest since records began in 1872, while the current number of 90-degree days places it as the sixth most in recorded history.
The significant heat has led to a mix of public health warnings and recorded emergencies due to the extreme conditions. Boston EMS reported a 10% increase in call volume on Tuesday, responding to 17 heat-related incidents. The age of affected individuals ranged between 11 and 84 years, many of whom had been outdoors for prolonged periods.
The high temperatures, compounded by humidity, have created “feels-like” conditions that are forecasted to reach between 100 and 110 degrees. As a safety measure, the Centers for Disease Control and Prevention (CDC) advises the public to wear light clothing, stay hydrated, and limit outdoor activities during peak heat hours. Adding to the city’s response to the heat, the Department of Public Utilities has requested electric utility companies to impose a moratorium on service shut-offs during this extreme heat episode.
In an effort to keep residents cool, a special policy was enacted allowing concertgoers at Fenway Park to bring refillable water bottles and mini fans. This move aims to ensure that fans can remain hydrated and maintain a level of comfort during events held in the heat.
For those seeking respite, a slight cooling is anticipated as afternoon seabreezes are expected to bring temperatures down somewhat on Wednesday, although morning forecasts still predict highs around 90 degrees. A cold front is in the forecast for Thursday, promising more significant relief from the dangerous heat, potentially dropping temperatures back down to the low 70s.
Despite this temporary relief, continued warm weather is expected throughout the summer, with additional days projected to reach the 90s. As such, residents are advised to keep a close eye on the weather reports and engage in safety practices to mitigate the risks associated with these extreme heat conditions.
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Additional Resources
- Boston 25 News
- Wikipedia: Heat Wave
- CBS News
- Google Search: Boston heat wave
- NBC Boston
- Google Scholar: Boston weather heat
- Hoodline
- Encyclopedia Britannica: Boston weather 2025
- CBS News: Heat Dome Map
- Google News: Boston weather news
