On this day in 1969, a devastating derecho formed over Lake Erie and blasted across northeastern Ohio and western Pennsylvania; it has been dubbed “the Ohio Fireworks Derecho.” 32 homes and 300 mobile homes were destroyed, and over 10,000 others were damaged, as well as widespread tree and power-line destruction. 700 boats were destroyed on Lake Erie. 46 people were killed, and 559 were injured. Three of the deaths occurred on Lake Erie when the storm struck during a fireworks display, capsizing the boat they were on. Source.