Yeah... there's some solace in that it wouldn't have made a damn bit of difference anyway...
But I like the way you think out of the box and see (plan) forward... seeking solutions before the fact... That platitude wouldn't have comforted me much, in that no solution was found. Even if no solution was possible. It'd just rub me all wrong.
Either way, sure sorry for your loss. I know all the good stuff is fine, and everyone is out of harm's way, but from the look of things, you have a dang rough row to hoe for the next year or so... There ain't no doubt about it. 
You are quite right. My horses and cows are on the other side of the river. My youngest and dogs ares with Grandparents to the west of Houston. My High Schooler is south in Angleton with a friend so she can take care of her show heifer; which she cannot get to due to flooded roads, and the family that took her in, is under a mandatory evacuation, but likely safe anyways.
We are staying in my Father In Law's house, which we expected to flood two days ago. He is 92 and in a wheelchair; we evacuated him to a nursing home. The large creek flooding from the River rise in this area, has slowed down. It will be close, water is almost blocking travel out the street. But we think we will be a foot above the peak if the predictions hold.
Two nights ago we evac'd out and spent the night on our church floor. But with the slowing of the rise, and the break in the rain, we felt safe enough to return. Our trucks can get through some water.
The first night we evacuated, we went to a friends camping trailer in Sienna Plantation, a subdivision protected by levees. During that night, the warning came in. We helped move their belongings to their second floor, then moved out to here. They pulled their camper out and are sleeping in a parking lot, moving soon to a campground.