A dangerous heat wave is gripping the Northeast, with New York City declaring a heat emergency as temperatures and humidity combine to push feels-like temperatures above 100°F through the Fourth of July weekend. Forecasters say Central Park could reach 100°F for the first time since 2012, nearing the city's all-time record of 106°F, set on July 9, 1936. Officials are urging residents to stay indoors, use cooling centers, and limit time outside during the hottest parts of the day. (via extremeweatherwatch.com , NBC New York)