Roxy wrote:my poor, poor plumeria and orange tree.

It may be too late, but your plumeria can easily be dug out of the ground and thrown in the garage. I've even heard of people just cutting them off at the ground and replanting in spring. They root very easily. As for the orange, most types can make it through the low 20s if they're hardened off by prior cold, so it may not suffer too much (depending on where you're at in the Houston area)
On an encouraging note, I see where forecasts are slightly warmer today, probably due to the modest eastward and milder shifts in the models. This would be great news if true but for now I'm still operating under the assumption that it'll be similar to 1996, potentially a tad harder on vegetation due to the predicted high winds and low dewpoints