Skip Main Navigation

fast facts

Recurrent Tidal Flooding

High tides are causing more flooding more often.

10 to 20 times per year

Several cities are experiencing tide-related flooding 10 to 20 days or more a year along with the associated public safety and health risks, such as road closures, overwhelmed storm drains, and compromised infrastructure and water quality.

El Niño influences?
Recurrent Tidal Flooding

Prolonged high sea levels along the West Coast and prevailing wind changes along the East Coast during stronger El Niño cycles compound nuisance tidal flood frequencies during the fall-spring seasons.

300 925 percent increase

Scientists say this type of flooding has increased upwards of 300 to over 900 percent since the 1960s around the U.S. coast. Flood frequencies in several East Coast and Gulf Coast cities are actually accelerating, which implies that once impacts become noticeable and of concern, they will become commonplace rather quickly.

Future ‘tipping points’?

Projections say the majority of coastal communities will experience 30 days of tidal flooding annually by 2050.

Graphic stating the United States has seen a 300-925% increase in recurrent tidal flooding, averaging 10-20 times per year.  Recurrent tidal flooding creates public safety and health risks.
Graphic is presentation-ready: copy and paste for use in a handout or presentation.