Sea Level Rise Will Displace Communities in Every Corner of the Bay Area

Sea level rise is already flooding communities with such regularity that many residents are deciding to leave. The sea level rise tipping point will expand its reach as the climate changes.

1 minute read

July 15, 2017, 9:00 AM PDT

By James Brasuell @CasualBrasuell


Sea Level

Tom Hilton / Flickr

"Coastal neighborhoods in several Bay Area cities are likely to face such frequent flooding from rising sea levels over the next century that residents will simply pack up and leave, according to a new study of the effects of climate change," reports Kurtis Alexander.

Those findings are from a report issued earlier this week by the Union of Concerned Scientists [pdf], which is "the first nationwide effort to identify the point at which coastal communities face the no-win decision of having to flee or fight sea level rise."

The report assumes a "point of no return"—when  "at least 10 percent of a community experiences flooding 26 days a year, or one day every two weeks," explains Alexander. "Already, more than 90 communities across the nation have hit a point of disruption that’s driving people away […] Eighty more are expected to reach that threshold within 20 years if global warming continues at a moderate rate."

Planetizen shared resources on the issues of "managed retreat" earlier this year, and documented the experience of the Alaskan village of Shishmaref, which voted last year to relocate entirely.

Wednesday, July 12, 2017 in San Francisco Chronicle

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

October 28, 2026 - Zachary Whalen

A car drives through a puddle, making a large splash. Rain pours down.

California plans to bury El Niño’s downpour

If the state plays its cards right, it may be able to store a billion acre-feet of El Niño’s water in aquifers.

October 28, 2026 - Grist

A pencil rendering of Foundry Park, which shows skyscrapers and public green spaces.

Chicago breaks ground on $3 billion megadevelopment

The new neighborhood, titled Foundry Park, will one day host 3,700 residences.

October 23, 2026 - Chicago Sun Times

 A bridge stretches across the Missouri River at Chamberlain, South Dakota.

Want to study the Missouri River? Soon, you may need unanimous approval from 10 states

Legislation would require 10 governors’ permission to study or build projects moving water outside the basin.

45 minutes ago - South Dakota Searchlight

Lake Powell with much of the water evaporated.

Desperate measures: Advocates weigh draining Lake Powell to fill Colorado River

Draining the reservoir could reduce evaporation losses by a couple hundred thousand acre-feet.

1 hour ago - Yale Environment 360

An Ariel view of Ocean Parkway, a busy six-lane highway

This road in NYC is infamously dangerous — and Mamdani can't fix it

New York City's Ocean Parkway is known for reckless driving, but the power to implement safety measures lies with the state rather than the city.

2 hours ago - Gothamist