News NYC weather: Heat, humidity continue as temperatures soar into 90s New York City will officially be in a heat wave if the mercury rises above 90 degrees on Wednesday. Extreme heat hit New York City on Tuesday, sending some folks to Washington Square Park to cool off. Photo Credit: Spencer Platt / Getty Images By Lauren Cook email@example.com @L_Cook865 Updated August 28, 2018 5:49 PM Print Share fbShare Tweet Email Labor Day may be right around the corner, but the steamy summer heat isn’t going anywhere. New York City is poised for another heat wave and officials are warning residents to take precautions. A heat advisory is in effect for the five boroughs through 9 p.m. Wednesday, as temperatures are expected to reach 95 degrees with a heat index value of 103, according to the National Weather Service. A heat wave is triggered when the temperature is above 90 degrees for three or more consecutive days. Monday’s high temperature at LaGuardia Airport was 91 and Tuesday hit 94 degrees, per the NWS. Cooling centers, which are free for the public to use, have been opened around the city. Mayor Bill de Blasio urged New Yorkers to stay out of the sun and drink water. “Keep cool, keep hydrated and check in on your neighbors, particularly seniors or anyone with a medical condition,” de Blasio said. A 30 percent chance of showers Thursday afternoon will help bring the temperature down a bit, but the humidity will stick around. The high is predicted to be around 87 and the overnight low will drop to around 70, the NWS said. Cloudy skies and a chance of rain continue on Friday and Saturday, with highs in the mid-70s. The sun will return to the city on Sunday, with a high near 79 degrees. By Lauren Cook firstname.lastname@example.org @L_Cook865 Lauren joined amNY.com as a news editor in 2016. Previously, she worked as a web producer at CBS New York and News 12. Share on Facebook Share on Twitter Comments We're revamping our Comments section. Learn more and share your input.