Cities across much of the central and eastern part of the country are activating emergency plans and altering America 250 celebrations as record-breaking high temperatures build across the nation through the July 4 holiday weekend.
New York City, Philadelphia, Chicago and other major metro areas have activated heat response plans, with more than 160 million people across the country already under Heat Alerts.
New York City Mayor Zohran Mamdani announced that cooling centers will begin to open Wednesday, including new, mobile cooling vans that will also allow city workers to provide hot weather wellness checks…