This was much more of a wind event, far west of Houston, than it was a water/flooding event.
A friend of ours runs several landscaping crews, out of the Sealy/Wallis area and said he’s never seen anything like it, for a Cat 1 ... huge, established trees (pecans, etc) uprooted, and, downed, everywhere.
I’m in Southeast Alabama, so I’ve seen my share.
My land used to be part of a large pecan farm, but most of the trees where blown down by Hurricane Opal in 1995.
I’ve regrown a number of trees since. Over the past 10 years or so, every hurricane gives me anxiety.