There are some maps and projections of this from yesterday too. It's predictable given the release at the dam at Lake Livingston.
Radio feed:
23rd and broadway mobil in Galveston has gas.
Yale at 4th(Heigths?): Orange juice factory amonia leak. Close windows and shut off AC if in this area.
Ps: From what I can tell the rain totals were not that great above the Lake Livingston area, the 80k cfs is mostly due to the emergency release at the dam to draw it down for repairs. Its a good time to see clear skies and a falling lake level. I notice on your link the release will come up just short of major flood stage.