Hot weather has lead me to research water falls in Ohio.
If you are in the Akron / Cleveland area, Brandywine Falls is worth the time to visit.

Place Category County State Country Lat D Long D Elevation
18 Rows Data exported from DRC 2.0 (c) 2009 Gary Kindel
Blackjack Falls falls Hocking OHIO USA 39.47833 -82.51639 880
Brandywine Falls falls Cuyahoga OHIO USA 41.28611 -81.56417 1015
Cascade Falls falls Lake OHIO USA 41.67389 -81.18444 950
Cedar Falls falls Adams OHIO USA 38.83667 -83.37556 1220
Cedar Falls falls Hocking OHIO USA 39.41944 -82.52361 1220
Chagrin Falls falls Cuyahoga OHIO USA 41.43111 -81.3925 770
Coppacaw Falls falls Summit OHIO USA 40.62611 -84.59056 990
Deans Fall falls Geauga OHIO USA 41.95972 -80.55306 680
Greenville Falls falls Miami OHIO USA 40.10722 -84.37472 1040
Grove Falls falls Knox OHIO USA 40.38306 -82.26333 810
Hemlock Falls falls Richland OHIO USA 39.58861 -82.15556 765
Lantermans Falls falls Mahoning OHIO USA 41.06694 -80.68222 910
Limestone Falls falls Coshocton OHIO USA 40.65528 -81.40611 960
Lyons Falls falls Ashland OHIO USA 41.70333 -84.07028 771
Ophir Falls falls Jackson OHIO USA 39.90944 -82.16278 980
Prays Falls falls Lucas OHIO USA 39.75333 -84.22833 830
Stewarts Falls falls Columbiana OHIO USA 41.48694 -81.64639 1051
Sugar Creek Falls (historical) falls Tuscarawas OHIO USA 40.63556 -81.56056 640