Think cool thoughts — a heat wave is expected to descend on Boston Tuesday, June 18, and last through Friday, June 21, bringing excessive, potentially record-breaking temperatures and humidity.
The National Weather Service issued a Heat Advisory in Suffolk County that begins at 12 p.m. Tuesday, June 18 and lasts through 7 p.m. Friday, June 21. During the advisory, the heat index value — the way humidity + temperatures feel on the body — could exceed 100°.
In response to the anticipated heat, Mayor Michelle Wu declared a “heat emergency” through Thursday, encouraging locals to take precautions to stay safe.
- The Boston Center for Youth and Families will operate 14 Cooling Centers throughout the city.
- Boston Public Libraries will be open for locals trying to escape the heat — though they will close on Wednesday, June 19 to observe Juneteenth.
- The city has provided information for residents to prepare for the weather and to address emergency situations.