He's not some scourge visited upon us from the sky like the drought. He's governor because people keep voting for him. Specifically, the people of West vote for him. In 2010, it was Perry 53% over 44% for Bill White. In 2012, they voted 77% for Romney and 73% for Teabagger Ted Cruz. (These are from the election returns for Precinct 67 of McLennan County, which has the Community Center in West as its polling place.)
I feel terrible for the people of West and the disaster that has befallen their community. But the reason they live in a town where it's perfectly OK to build a school across the tracks from a fertilizer plant, a plant which doesn't have an emergency plan, a plant which has tons and tons of potentially explosive chemicals on hand and doesn't even bother to mention that fact to local authorities in case there's a problem and the volunteer fire department has to respond is they vote for that.
Yes, Rick Perry is an asshole. But it's the people in all these miserable little shithole towns across the state who make him Governor Asshole.