The worst heat wave of the year has seized the tri-state, threatening three consecutive days of heat in the mid-to-high 90s, though it’ll feel more like a sauna, with stifling humidity making it feel like 104 degrees at a minimum.

The “coolest” feels-like temps will be Friday, when thermometers will read around 94 degrees but it’ll feel like 104 degrees.

The mercury climbs even more on Shabbos — up to 98 degrees with feels-like temps of 107 and, despite a slight drop in actual temperatures Sunday, the humidity will make it the worst day of the stretch, with a feels-like temp of 109 degrees in the city.

Officials with the New York City Triathlon announced Thursday that Saturday’s race had been canceled due to the extreme heat that was expected.

The race organizers said they were “unable to provide either a safe event experience or an alternate race weekend.”

New York City Mayor Bill de Blasio, fearing a major blackout after a smaller power outage hit parts of the city last weekend, asked tall office buildings to raise the building temperatures ahead of the heat wave to conserve power, the New York Post reported.

He declared an emergency Thursday night asking buildings taller than 100 feet to raise their thermostats to 78F.

“We are about to enter a heat emergency, and must do all we can to keep New Yorkers safe,” de Blasio said. “The City government is limiting its energy use to reduce strain on the electrical grid, and now private office buildings will also have to do their part.”

New York City’s office of Emergency Management urges New Yorkers to take precautions to prevent serious illness that can result from the heat, especially among vulnerable individuals such as seniors and those with chronic health problems or mental health conditions.

New Yorkers who are vulnerable should use air conditioning to stay cool, go to a place that has air conditioning if it is not available at home, drink water at regular intervals, and limit strenuous activity, especially during the hottest parts of the day. New Yorkers are urged to check in on vulnerable friends, family members and neighbors to help them stay cool.

Pay special attention to the elderly, the very young, and anyone with a pre-existing medical condition. New Yorkers should check in on older neighbors who may be isolated from friends and family.

(Sources: NBC New York / ABC7)