The costs and damages of flooding are overwhelming communities along coasts, near rivers and on big lakes. Across the country, urban floods are happening at a rate and extent that is pushing disaster resilience to the forefront of public safety discussions. We all pay the price of more frequent flooding, even if the danger and damage are happening in someone else’s town. In fact, the Insurance Institute of Canada reports that the multi-billion-dollar cost of insurance claims is on track to more than double over the course of a decade.
Trying to tame the tide exacerbates climate crisis
In 1908, locals in Cape Cod, Mass., built an earthen dike across the Herring River to curtail its flow into the surrounding wetlands. Their goal was to clamp down on the number of mosquitoes. The dike destroyed the original salt marsh, replacing it with woodland, shrub, and impounded wetlands. But the community’s efforts over a century ago did far more than dry out the landscape. According to a new study, impounded wetlands can undergo an important change, shifting from carbon sinks into methane sources. The transformation turns these landscapes from ones that help mitigate climate change into ones that exacerbate it.