The way the federal government analyzes intense rain events isn’t keeping up with the reality of climate change, and that has serious implications for infrastructure projects and the availability of, and rising cost of, flood insurance.
Severe rainstorms, sometimes described as “atmospheric rivers” or “torrential thunderstorms,” are making the concept of a “1-in-100-year flood event” obsolete, according to a report from First Street Foundation, an organization focused on weather risk research.
These events are occurring more frequently due to the impact of climate change, but federal rainfall analysis, managed by the National Oceanic and Atmospheric Administration, isn’t keeping up with the new weather conditions, First Street says.
Half the people in the U.S. live in a county where a 1-in-100-year flood is at least twice as likely now as it had been in the past, coming once every 50 years instead of every 100 years. In some areas, a so-called “1-in-100-year” rainfall could now happen far more frequently—as often as every 5 to 10 years.
The outdated analysis has serious implications for the way infrastructure projects are initiated and designed. And, because FEMA’s federal flood insurance program greatly underrepresents the number of people that could fall into FEMA’s Special Flood Hazard Areas, millions of Americans may be unaware of their current flood risk.
Inaccurate flood risk data due to underestimating the impact of rainfall also impacts the cost and availability of flood insurance—this is especially true for property that isn’t close to the ocean or inland bodies of water.
The government is working to remedy the situation, though. NOAA, as reported by CNN, says it is working on a revamped approach to its rainfall analysis that is expected to be completed in 2027.
Related Stories
| Mar 17, 2014
Coin toss decides who gets $4.4 million construction contract
When two builders submitted identical bids for the Gretna (La.) Police Headquarters, the city council decided to choose the winner through a coin toss.
| Mar 17, 2014
Rem Koolhaas explains China's plans for its 'ghost cities'
China's goal, according to Koolhaas, is to de-incentivize migration into already overcrowded cities.
| Mar 13, 2014
Austria's tallest tower shimmers with striking 'folded façade' [slideshow]
The 58-story DC Tower 1 is the first of two high-rises designed by Dominique Perrault Architecture for Vienna's skyline.
| Mar 12, 2014
London grows up: 236 tall buildings to be added to skyline in coming decade, says think tank
The vast majority of high-rise projects in the works are residential towers, which could help tackle the city's housing crisis, according to a new report by New London Architecture.
| Mar 12, 2014
14 new ideas for doors and door hardware
From a high-tech classroom lockdown system to an impact-resistant wide-stile door line, BD+C editors present a collection of door and door hardware innovations.
| Mar 10, 2014
Field tested: Caterpillar’s Cat B15 rugged smartphone
The B15 is billed by Cat as “the most progressive, durable and rugged device available on the market today.”
| Mar 10, 2014
5 rugged mobile devices geared for construction pros
BD+C readers share their most trusted smartphone and tablet cases. The editors select some of their faves, too.
| Mar 6, 2014
Must see: Tour Seinfeld's apartment with virtual reality headset
Fans of the show can now explore a virtual 3D model of the iconic New York residence, thanks to one Web designer's painstaking effort.
| Mar 5, 2014
5 tile design trends for 2014
Beveled, geometric, and high-tech patterns are among the hot ceramic tile trends, say tile design experts.
| Mar 4, 2014
How EIFS came to America
Design experts from Hoffmann Architects offer a brief history of exterior insulation and finish systems in the U.S.