July 17, 2019 12:11 pm Why the Heat Is Worse in Urban Areas NBC10 First Alert Weather meteorologist Steve Sosna explains why the cumulative effect and urban heat island effect causes metropolitan areas to feel even hotter. US & World Videos 1:47 New nationwide Xfinity ad features 3 Vietnam War vets as Military Appreciation Month begins 1:08 Philly police believe teenage girl stabbed grandmother to death inside rowhome 2:10 ‘You're speechless and can't believe what you saw.' Mom sees video of attack on her autistic son on SEPTA train 0:39 1 dead, 3 injured in Eastwick after two separate shootings, police say 0:22 Rescue crews call off search for missing kayaker in Schuylkill River