Scorching temperatures persist as heat wave expands, with record-breaking temperatures expected across U.S. CBS NewsA heat wave is bringing searing temperatures to New York and the I-95 corridor. Washington DC has hit 100 degrees CNNMuch of U.S. Bakes as Some Cities Break Temperature Records The New York TimesAs the U.S. heat wave drags on, experts warn of deadly ‘wet-bulb’ temperatures. Here’s what those are. Yahoo! Voices