Dozens of record high temperatures are set to be shattered along the I-95 corridor in the Northeast this weekend as an unusual May heat wave pushes the mercury into the mid and perhaps even upper 90s across most of the region, which could be especially dangerous since many are unaccustomed to extreme heat this time of year.

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Philadelphia and Trenton, New Jersey, are expected to hit 96 Saturday afternoon, with the mid-90s also expected to the north and west of New York City.

New York City itself will get a bit of a respite compared to the rest of the Northeast due to cool water temperatures, with forecasters expecting highs to top out in the mid-80s there throughout the weekend.

Boston will also escape the heat Saturday, with a high of around 80, but forecasters expect the high to soar there to 97 on Sunday.

A 97-degree reading in Boston would tie the city’s all-time high for the month of May, set on May 26, 1880.

The scorching temperatures combined with high humidity will push heat indices to around 100 throughout the Northeast.