Those temporary levees will become saturated and fail, sadly..
bttt
Actually, those levees look as if they will hold long enough for the water to retreat.
some good seat of the pants engineering goin on here.
Levees will continue to work nicely even when saturated. The thing you have to watch for is a boat bumping a levee hard inorder to brek it when saturated or a large wake.
After some experiences in 1993 floods in Missouri, we post farmers on levees with scoped .30-06s in order to keep boaters from breaking the levees. One guy did it in 1993 and flooded 40,000 acres in Illinois and he is now in the state pen and will never see the sunlight except over a guard tower.
The armed people on the levees are given the authority to shoot to kill and they will. This is very serious stuff.
#28 has the better solution: just pile the dirt up right around the house itself. More dirt, smaller area, deeper, no breach risk.