Sweat beads on the head of musician Jimbo Jackson as temperatures reach into the 90’s as he performs in the Mellon Square Concert Series in downtown Pittsburgh on Thursday, July 21, 2011 in Pittsburgh. (AP Photo/Keith Srakocic)
Sweat beads on the head of musician Jimbo Jackson as temperatures reach into the 90’s as he performs in the Mellon Square Concert Series in downtown Pittsburgh on Thursday, July 21, 2011 in Pittsburgh. (AP Photo/Keith Srakocic)
