From the National Weather Service:
An Excessive Heat Warning continues for much of Southern New England. A Heat Advisory is in effect for Cape Cod, Martha's Vineyard, and the Berkshires. There are no heat headlines for Nantucket and Block Island.
Below are the forecast high temperatures for today, the forecast heat index values for today, and the forecast low temperatures for tonight.
Note that the forecast low temperatures for tonight could pass as average daytime highs in some parts of Southern New England.