Harvey aftermath: More Houston homes at risk as Beaumont loses clean water
http://edition.cnn.com/2017/08/31/us/harvey-houston-texas-flood/index.html
Chemical industries must keep water prohibitive substance away from flooding.
And, substance which explodes under room temperaure must be kept in air-conditioned room or box.
All of them mean "Hazardous chemicals and emergency power suppliers must be kept on higher floor to avoid flooding."
It's one of the rules taught by this hurricane.