Researchers at Princeton and Rutgers recently took into account the fact that coastal cities face this combination of small (high-probability) and large (low-probability) flooding events. They took observations from the National Oceanic and Atmospheric Administration’s (NOAA) tide gauges and used statistical techniques to measure the occurrence of historically low- and high-probability events across coastal locations. They then used sea-level rise projections to understand how the frequency of low- and high-probability events would change at each location.
The key insight from this study is that sea-level rise will have a different impact on flooding patterns in different regions of the country. Charleston, South Carolina, will see a larger increase in moderate floods than in severe floods (though both types of floods will increase), while Seattle will see the opposite pattern.
The study also demonstrates that flood frequencies will increase dramatically in many coastal areas by 2050. The blue and green dots in the maps below show the places where flood frequencies will increase by hundreds or even thousands of times from today (Alaska and Hawaii were also modeled in the study, but not shown in this map. The full dataset is here).
It’s no wonder, then, that cities and businesses across the country are taking steps to prepare for flooding and other climate change risks. We continue to urge them to work together to find the options that work best for the community overall.
Cities and businesses are separately preparing for climate change and building their resilience to impacts. But they have not had guidance on how to work together, until now. This report lays out the value in public-private collaboration on city climate …