From the K96 Facebook page:

The National Weather Service in Cleveland issued an excessive heat watch and/or warning for significant portions of Northern Ohio over the weekend. It will be in effect Friday afternoon to Saturday evening.

After serious consideration and speaking with Huron Boat Basin Management, due to the extreme conditions, and concern for the health and safety of those involved, K96 and WLKR have made the decision to cancel our Summer Jam on Saturday, July 20 at the Huron Boat Basin.

We apologize for any inconvenience this may cause. Stay cool and stay safe!