The Island's already steamy weather will only get hotter by Saturday, when heat affecting the Southeast makes its way up the coast, forecasters said.
Forecasters say temperatures for Saturday will hit the low to mid-90s but could feel as high as 100 degrees with the heat index.
New York City will see scorching temperatures of 100 degrees and will feel like 106 degrees with the heat index.
"The good news is that it's short-lived," said meteorologist Brandon Smith of the National Weather Service in Upton. Sunday will be significantly cooler, he said, with temperatures dropping about 10 degrees.
For Friday, temperatures will likely remain in the mid- to high 80s with a chance of thunderstorms possible. Weather officials also warn swimmers of a high risk of rip currents on beaches Friday.
Windy conditions over the next two days could lead to an elevated risk of spreading brush fires in dry areas, the weather service said. Officials say to take precautions, such as not driving cars over dry, grassy areas.
According to the LIPA website, 265 customers are still affected -- 203 of which live in Brookhaven -- as of 9:30 a.m. Friday.