Climate change is already making extreme weather events more common and more damaging, and flooding is one of the most serious consequences. Flooding can damage homes, critical infrastructure, and disrupt transportation and communication networks. It can contaminate water supplies and lead to dangerous mold growth. And it can displace people from their homes, sometimes permanently.
The impact of climate change on flooding and storm damage is already being felt around the world. In the United States, for example, the number of “100-year floods” has nearly quadrupled since 1980. That trend is expected to continue as the planet continues to warm.
There are a number of factors that contribute to the increased risk of flooding. One is sea level rise, which makes coastal flooding more likely and more severe. Another is the increased intensity of storms, which can lead to more heavy rain and more severe flooding. And finally, warmer air can hold more moisture, leading to more extreme precipitation events.
The bottom line is that climate change is making floods more frequent and more damaging. And that means we need to be prepared for the increased risk. That means building flood-resistant infrastructure, preparing for evacuations, and providing assistance to those who are displaced by floods.
https://www.climate.gov/news-features/understanding-climate/climate-change-and-flooding
https://www.epa.gov/climate-indicators/climate-change-indicators-flooding
https://www.nrdc.org/stories/climate-change-and-flooding