06/30/2026 | Press release | Distributed by Public on 06/30/2026 11:45
The National Weather Service forecast indicates that an extended period of extreme temperatures and humidity will be arriving in the Cambridge area tomorrow. Sustained high temperatures and heat indices are expected to last into the weekend. As a result, the City of Cambridge has declared a heat emergency through July 4.
Hot weather and extreme heat can cause serious illness and can even be life-threatening. Heat-related illnesses, like heat stroke and dehydration, can occur.
There is an increased risk for heat-related illness in high-risk populations including older adults and young children, people with chronic medical conditions, unhoused individuals, and those who work outside.
Residents are encouraged to stay hydrated and spend time in air-conditioned places such as malls, community spaces like the Foundry, and public libraries.
Residents can also visit pools and parks with water features.
Visit cambridgema.gov/heat for detailed information about how to stay safe in the heat.
Outreach teams will be utilized to support the unhoused community during extreme heat. If you are concerned about a person who is unhoused, please call First Step at (617) 592-6895 or call 911 if the person is experiencing an emergency.
Due to the extreme heat, residents staying area shelters, including the CASPAR Shelter at 240 Albany Street and the Salvation Army in Central Square, will be allowed to stay or drop-in during extended day hours.
Teams with the Cambridge Police, Cambridge Fire, Pro EMS, the CARE Team, library staff, and other community partners will be proactively checking on our unhoused residents and have cold water and medical support readily accessible for any individuals in need.
PREPARE FOR EXTREME HEAT
Learn the Signs of Heat-Related Illness
Extreme heat causes the body to lose fluids quickly through sweating. This can lead to dehydration and serious heat-related illness. People most at risk include older adults, children, pregnant people, people experiencing homelessness, outdoor workers, and people with chronic health conditions.
Common warning signs include:
If you notice these symptoms in yourself or someone else, move to a cooler place and seek medical help if symptoms worsen. Learn more about heat-related illness and when to seek medical care from the Massachusetts Department of Public Health and at Heat.gov.
Know How Your Medications Interact with Heat and Sun
Some medications can increase the risk of heat-related illness. Medications can increase sensitivity to the heat or the sun, reduce thirst, impair sweating, and cause other effects that put people more at risk as the temperature rises. Heat can also degrade medications. Since individuals aged 65 and over and those with chronic illnesses are more likely to take medications, they are more likely to be impacted by these issues.
Know Where to Cool Down
During extreme heat, it's important to know where you can go to cool off and stay hydrated - especially if your home loses power or doesn't have air conditioning. If you have to spend time outside, plan to be in the shade, or in the water. Make a list of nearby places to go to stay cool, and keep it somewhere easy to find.
Places to cool off in Cambridge include:
WHAT TO DO ONCE HEAT HITS
Keep Your Home Cool
Take Care of Yourself
Take Care of Others
Keep Pets Safe
Extreme heat can also be dangerous for pets. Never leave animals in a parked car, even with windows open. It can get dangerously hot quickly. Pets cannot cool themselves as efficiently as humans. Make sure they have: