I know a few people that now plan to spend a bunch of $$$ on generators, etc....so they can avoid feeling the effects of a similar event. It seems counterintuitive that people are planning to spend a ton on emergency prep for a 500-yr event directly after a 500-yr event. Isn't it far more likely that you won't see another similar event in your lifetime?
Funny thing about those 100-yr, 200-yr, etc events is that we've had several of them in last decade. And, they don't have records that go back that far but are based on statistics which might be OK if basis of assumptions never changes or there is linear growth but that's not reality.
Take for example the 100/200yr FEMA flood plains. Those studies take years to complete meanwhile in Houston the building is exponential. By the time the study is complete, there are countless new developments completed that render the study obsolete before it is official.
During Hurricane Harvey several folks at my church who live in old Katy, TX and never flooded, but were now flooded by several feet. The consortium of builders have a lot of political influence here. New neighborhoods are built 3/4/5-ft up above adjacent homes. They supposedly have 100yr retention to offset their runoff, but they just push the water to the folks unfortunate to be next door. Generally speaking, every new home built to N/W is better off than those to S/E until someone else does the same to them.
Everyone knows its a problem but it will require someone sticking their neck out politically to push for HUGE cash to fix it. Apparently it's same problem with Texas grid. I have seen very little done to mitigate another Harvey situation. People have short term memory and the news changes fast. I'll bet nothing is done, same as always.