From the National Weather Service:
The heat goes on, with temperatures reaching the low to mid 90s and dew points in the low 70s. This means the Heat Index will climb as high as 103 degrees in spots.
A Heat Advisory is in effect from 11 AM to 7 PM in all areas except the Berkshire East Slopes and the Cape/Islands.
Wear light-weight and light-colored clothing today. Drink plenty of water, non-alcoholic and decaffeinated fluids.