Boston declares weekend cold emergency as wind chills plunge below zero, warming centers activated citywide

Cold emergency set for the weekend as dangerous wind chills move into Boston

Boston officials have declared a cold emergency for an upcoming winter weekend as forecasters project a sharp drop in temperatures and wind chills below zero. The declaration is designed to expand access to warm indoor spaces and strengthen outreach to people most at risk during prolonged exposure to extreme cold.

In a city notice, officials said the cold emergency will run from Friday through Sunday. Forecasts cited by the city indicate wind chills are expected to fall below zero on Friday and Saturday, with the coldest conditions projected overnight into Saturday. City information describing the forecast referenced wind chills as low as minus 21 degrees Fahrenheit on Friday and minus 27 degrees on Saturday.

What a “cold emergency” means in Boston

The city uses a wind-chill threshold to determine when to escalate to an emergency declaration. Under Boston’s current guidance, a cold emergency is triggered when wind chill is expected to reach minus 10 degrees Fahrenheit or lower for at least one day. A separate “cold advisory” threshold is set at 0 degrees Fahrenheit or lower wind chill for at least one day.

The city’s messaging emphasized increased health risks during these conditions, particularly the danger of hypothermia and frostbite. Officials highlighted heightened vulnerability among older adults, young children, people with disabilities, and people experiencing homelessness.

Warming spaces and shelter access

Boston Centers for Youth & Families community centers are expected to serve as warming centers during normal operating hours on the days specified in the city’s announcement. Boston Public Library locations are also available for residents seeking a heated indoor space during normal hours.

For people experiencing homelessness, the city said emergency shelter operations and outreach would be expanded during the cold emergency, including coordination among shelters, outreach teams, city agencies, and first responders. The city also urged residents to call 911 if they see someone outdoors who appears immobile, disoriented, or inadequately dressed for the cold, or if someone is staying in a vehicle or a place not intended for living.

• BCYF community centers: activated as warming centers during posted hours
• Public libraries: available as daytime warming spaces during normal hours
• Emergency response: outreach, wellness checks, and transportation assistance coordinated with first responders

Safety guidance for residents

City guidance for residents focused on layered clothing, limiting time outdoors for children, and recognizing warning signs of cold-related illness. Officials also warned against unsafe indoor heating practices and encouraged residents to ensure smoke and carbon monoxide detectors are working, particularly when using space heaters.

Officials advised residents to check on neighbors and family members who may be at higher risk, including older adults and those with underlying health conditions, during the cold emergency period.

Boston’s announcement framed the declaration as a preventative measure to reduce medical emergencies and ensure residents and visitors can access warmth and support as the weekend’s arctic air arrives.