Officials Investigating Cause of Water Tank Plunge from Landmark Building

http://www.dnainfo.com/chicago/20130731/lakeview/water-tank-plunges-from-building-hurting-three-people

Water by it self isn't dangerous. However, if a full container of it should fall, then it very well can be.

Of course the water theme has been used in various stories over the years.

https://en.wikipedia.org/wiki/Dark_Water_(2002_film)#Plot

A paranormal aspect to the story gives it something extra.

https://en.wikipedia.org/wiki/Dark_Water_(2005_film)

https://paranormal-intersection.blogspot.com/search?q=water