Some of the residents here are thinking of staying elsewhere with the intense heat on the way.
The problems at 4343 North Clarendon started Monday night. It is a 29-story residential high-rise near Montrose. ComEd crews have been working to fix the problem with about a half a dozen trucks.
ComEd crews on site say a transformer overheated due to hot weather and that the building's management decided to cut cooling to take an energy load off the building.
The building also lost water service overnight, but that has been restored. Elevator service is also down from four lifts to one.
ComEd officials say the issues should be fixed Tuesday morning.
"It got hot, turned the air down, didn't sleep well, woke up this morning. felt the air and noticed that it was coming out and it was pretty warm," said resident Mary Beth Lynn.
"We have probably 10 percent elderly that live here, probably 45 percent of the people have little pets, and it's getting like an oven in there," said resident Mark Hoffman.
"I'm actually leaving the house early today to get to the office early because I know they're air conditioned. I'm probably going to stay working a little longer in the hope that this will get fixed," said resident Jim D'Archangelis.