"Catastrophic floods" refers to extremely severe and damaging floods that can cause widespread destruction and negatively impact people's lives, homes, and infrastructure. Full definition
The now frequent catastrophic flooding in the towns below has destroyed many homes and taken several lives. (rachelheldevans.com)
From shifting weather patterns that threaten food production, to rising sea levels that increase the risk of catastrophic flooding, the impacts of climate change are global in scope and unprecedented in scale. (hubpages.com)
Not to mention that ongoing glacial melt may negatively impact local populations as well as cause catastrophic floods. (natureworldnews.com)