Lousianna is among the states affected by the mightly Mississippi when in a horrific backwash, due to its very low lying ground. The Mississippi River will rise during the drenching rains that follow immediately after a pole shift, the ocean waters evaporated into the air during the worldwide hurricane that occurs during each pole shift condensing out of the air in a fury. The Mississippi will drain a wide area experiencing torrential rainstorms, and will put any bordering land at risk of flood surges, no matter how high the hill. Large amounts of water may pass though, at great speed, and when encountering an obstruction such as a hill, rise up as the path of least resistance. These flood surges will not be gentle, so escape in a boat, which would capsize and tumble in the roistrous waves, is not likely. Low lying states along the Gulf such as Mississippi and Louisiana, which border the Mississippi where it drains into the Gulf, can expect to be under water.
Note Mississippi River commentary.