Philadelphia June 7, 2021 11:23 am The Heat Is on With Feels Like Temps Around 100 NBC10’s Krystal Klei explains why some urban areas hold heat and get even hotter during heat waves like the one expected to be declared Monday. US & World Videos 3:08 One more warm day before temperatures drop over the weekend 2:40 How long will this summer-like warmth last? 2:14 The summer preview continues 2:16 Clearing out, warming into the 80s 2:35 Warm trend continues, but rain is on the way