The reason I doubt the hydrolock is that I live on the Mississippi Gulf Coast. Can you spell "Katrina" can you spell "we are in hurricane season right now?" Can you spell "20 ft plus tidal surge?' I know a bit about water over the roads.
I've been running CAI's for many, many years in many, many vehicles, including a lifted 4x4 CJ5 Jeep used to ford streams, and I have never experienced, nor have I seen hydrolock in any vehicle except one, a Corvette that tried to go through about 3 feet of water. Get over the hydrolock issue.
You have to try really hard to make that happen. I mean really hard. Given the long length of the tubing and the high location of the MAF and the actual intake manifold, you'd have to pull a lot of water up hill a long way before you got any into the cylinders. The engine would die for lack of air long before any water hit the cylinder head through an intake valve, IMHO.