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The outdated analysis has serious implications for the way infrastructure projects are initiated and designed.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
Healthcare Facilities | Jun 10, 2016
Top 10 health technology hazards include some influenced by space design
ECRI Institute’s annual list includes operational and workflow issues.
Codes and Standards | Jun 9, 2016
Supreme Court ruling could aid developers on properties containing wetlands
Unanimous decision allows landowners to take regulatory decisions straight to court.
Green | Jun 8, 2016
TD Bank Group's renovated Toronto office is first WELL-Certified project under WELL v1
The newly renovated 25,000-sf space achieved gold-level status.
Concrete | Jun 7, 2016
Concrete Institute publishes document providing concrete curing guidance
New curing monitoring techniques included.
Energy | Jun 7, 2016
Energy modeling payback typically as short as one to two months
Energy modeling is a ‘no-brainer—like checking MPG on a car’
Green | Jun 2, 2016
USGBC offers new LEED pilot credit: Building Material Human Hazard and Exposure Assessment
For assessing human health-related exposure scenarios for construction products.
Resiliency | Jun 1, 2016
Federal agencies boost standards for more resilient construction
HUD, FEMA, GSA, Army Corps of Engineers make policy changes.
Green | May 31, 2016
Miami Beach requires developers to meet green standards or pay a fee
Applies to structures larger than 7,000 sf.
Codes and Standards | May 27, 2016
Better enforcement needed for successful implementation of energy efficiency policies
Commercial buildings the focus of recent code initiatives.
Codes and Standards | May 25, 2016
LEED Dynamic is worth the effort, says commercial real estate executive
San Diego office tower is California’s first office building to receive LEED Dynamic plaque in recertification.
