Do you know for a fact that all the elderly and infirmed were evacuated from Houston?
Yes, by bus and plane.
"Do you know for a fact that all the elderly and infirmed were evacuated from Houston?"
Don't know about Houston, but everyone south of Houston evacuated the elderly and infirm. That was reported on the Galveston Daily News web site. (They even had one story about buses being at one city (La Marque), with the hired drivers doing a Nagin. They found volunteer drivers -- and the folks got out. The bus that burned was taking people from Bellaire, btw.