It's so horrible, devastating. Houston area got 1 YEAR's worth of rain (50 inches) in a five day period. Over 500,000 cars underwater/probably ruined. Nothing like it in recorded history.
Overall, Texans really are tough and amazing people. Tragedies like this bring out the best in some, the worst in others. People helping people rushing into harm's way to save lives, but, then there are the small number of complete jerks who are charging $5 for a bottle of water, or looting.
But for the grace God, we missed the brunt here in Austin (although I got five water leaks/drywall damage, including one in ceiling right over my "captains chair" in my studio, but no gear damage thankfully). As a person growing up in Louisiana no stranger to hurricanes, but this one will top Katrina in terms of sheer devastation.
My old band's bass player lives in Houston and is safe, but his house is flooded. I note he left behind most of his gear in the house, but brought his P-Bass with him as he got out. So there's that.
This thing is going to play out for a few weeks. Effects will be felt even outside Houston, for example Austin now has a gasoline shortage, as many Houston area refineries are closed...