July 17, 2011 11:46 pm The Heat Is On Brace yourselves Philly, we may be in for the hottest week of the summer. 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