> August 25 – Hurricane Katrina moved ashore southeastern Florida as a minimal hurricane, producing a peak wind gust of 97 mph (156 km/h) at Homestead General Aviation Airport. Heavy rainfall accompanied the hurricane, peaking at 16.43 in (417 mm) in Perrine, which caused flooding in the Miami metro area. About 1.4 million people lost power during the storm. Later, when Katrina made its devastating landfall along the northern gulf coast, its large circulation produced high tides, light rainfall, and gusty winds along the western Florida panhandle. The hurricane killed 14 people across the state, and damage was estimated at $623 million.[54][55][56][57]
https://en.m.wikipedia.org/wiki/List_of_Florida_hurricanes_(...
Category 1 storm knocked out power for 1.4 million Floridians.
It seems "state_naturally_inefficient" social Engineering is similar always cheaper to solving problems.
Not to mention Houston is huge and dense so switching completely to underground would be a massive project that no one is going to enjoy.