I have not. I don't live anywhere where flooding would be a concern. Though for people who do live in the midwest/central US areas that would be a good thing to be aware of. Though the biggest concern regarding water is going to be having a drinkable source. In large cities you're going to find any waterways will quickly get contaminated or flat out dry up from all the desperately thirsty people/their waste, and even non-urban areas might find the water to become contaminated quickly.