Gulf Coast Tsunamis: What you need to know.
If you thought sinking land and rising seas were the only things we had to worry about in south Louisiana, think again.
Tsunamis have now joined the list.
Researchers with the National Weather Service say a 15-foot wall of water could roll across Grand Isle if a landslide occurred in the Mississippi Canyon, a trench in the Gulf of Mexico floor about 30 miles off the mouth of the Mississippi River.