The Best Solution To Flooding Turns Out To Be Something Missing For 400 Years

West London's Greenford Tube station used to flood every time it rained heavily, with sandbags lining the corridor as staff braced for each storm. Then in October 2023, a family of five beavers, two adults and three kits, was released into the 20-acre Paradise Fields nature reserve nearby, becoming the first beavers in that part of the British capital in 400 years, and the flooding stopped. The beavers built a dam, created a pond and wetland that absorbs and slowly releases stormwater, and the station has not been inundated since. The project was started by local veterinarian Sean McCormack and rewilding expert Elliot Newton of the conservation group Citizen Zoo, and it has since become one of the most-watched experiments in Britain's effort to adapt to increasingly extreme and erratic rainfall driven by climate change.

What the beavers did for Greenford's flooding problem, they did at a fraction of the cost of the reservoir and levee the city had been planning to build, and they brought along a remarkable suite of bonus outcomes no engineer could have promised. Freshwater shrimp have appeared in the creek, eight new bird species have arrived, two types of bats have taken up residence, and rare brown hairstreak butterflies have been spotted laying eggs on blackthorn branches nibbled by the beavers, which opened up the tree canopy and let in the light those butterflies need. Across Britain, reintroduction programs are expanding as communities recognize that beavers are one of the few climate adaptation tools that get better over time, cost almost nothing to maintain, and come with a growing list of ecological side effects that planners could not have designed. McCormack described the results as proof that the beavers can do it for a fraction of the cost and certainly more sustainably, and the City of London scrapped its expensive flood infrastructure plans entirely.

Source:https://www.npr.org/2026/05/21/nx-s1-5738979/beavers-britain-climate-change-flooding