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The outdated analysis has serious implications for the way infrastructure projects are initiated and designed.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
Giants 400 | Aug 29, 2022
Top 40 Student Housing Facility Contractors + CM Firms for 2022
J.H. Findorff & Son, PCL Construction Enterprises, Juneau Construction, and Sundt Construction top the ranking of the nation's largest student housing facility contractors and construction management (CM) firms for 2022, as reported in Building Design+Construction's 2022 Giants 400 Report.
| Aug 29, 2022
Montana becomes first U.S. state to approve 3D printing in construction
Montana is the first U.S. state to give broad regulatory approval for 3D printing in building construction.
| Aug 26, 2022
Idaho Building Code Board considers gutting large part of state energy code
Idaho Building Code Board considers gutting large part of state energy code.
Giants 400 | Aug 25, 2022
Top 100 Apartment and Condominium Contractors for 2022
Clark Group, Suffolk Construction, AECOM, and Lendlease top the ranking of the nation's largest apartment and condominium contractors and construction management (CM) firms for 2022, as reported in Building Design+Construction's 2022 Giants 400 Report.
University Buildings | Aug 25, 2022
Higher education, striving for ‘normal’ again, puts student needs at the center of project planning
Sustainability and design flexibility are what higher education clients are seeking consistently, according to the dozen AEC Giants contacted for this article. “University campuses across North America are commissioning new construction projects designed to make existing buildings and energy systems more sustainable, and are building new flexible learning space that bridge the gap between remote and in-person learning,” say Patrick McCafferty, Arup’s Education Business Leader–Americas East region, and Matt Humphries, Education Business Leader in Canada region.
| Aug 25, 2022
New York City’s congestion pricing aims to reduce traffic, cut carbon
Officials recently released an environmental assessment that analyzes seven different possible pricing schemes for New York City’s congestion pricing program.
Sponsored | BD+C University Course | Aug 24, 2022
Solutions for cladding performance and supply issues
This course covers design considerations and cladding assembly choices for creating high-performance building envelopes — a crucial element in healthy, energy-efficient buildings.
| Aug 24, 2022
California’s investment in ‘community schools’ could transform K-12 education
California has allocated $4.1-billion to develop ‘community schools’ that have the potential to transform K-12 education.
| Aug 24, 2022
Architecture Billings Index slows but remains healthy
For the eighteenth consecutive month architecture firms reported increasing demand for design services in July, according to a new report today from The American Institute of Architects (AIA).
| Aug 23, 2022
New Mass. climate and energy law allows local bans on fossil fuel-powered appliances
A sweeping Massachusetts climate and energy bill recently signed into law by Republican governor Charlie Baker allows local bans on fossil fuel-powered appliances.
