flooding – Enviro Updates

SuzanneJune 29, 2025Climate Change & Energy, Transportationemergency warning, fire danger, flooding, wildfire evacuation

Sonoma County emergency preparedness falls short, grand jury says, warning of ‘chaotic, life-threatening’ evacuations

Emma Murphy, PRESS DEMOCRAT

The report comes weeks after local fire officials warned the region is likely to experience a long peak fire season.

Despite years of work and extensive investments to bolster its disaster planning and response, Sonoma County remains ill-prepared for emergency evacuations in the event of another regional firestorm, flood or other major disaster, the county’s civil grand jury has concluded in a new report.

The stinging assessment comes even after the strides the county, local cities and grassroots groups have taken after the 2017 firestorm and subsequent disasters to improve planning for the type of large emergencies that can displace thousands of people at a time.

The tools and protocols now in place, the grand jury found, function only as a foundation for evacuation plans — and those plans, covering much of the region, lack the detailed, proactive steps to ensure they can work, especially along the county’s sprawling rural road network, the new report says.

The panel faulted the county for its lack of modern modeling technology to evaluate evacuation routes and plan around known traffic choke points. The county also depends too heavily on cellphone networks and the internet to communicate alerts — an unreliable method for rural residents, according to the 20-page report.

“Without accelerated investment in planning, communications, and road improvements — and full compliance with California’s legal standards — the risk of chaotic, life-threatening evacuations remains high,” the report states.

SuzanneMay 15, 2025Wateremergency warning, flood warning, flooding, NOAA, Russian River

Staffing cuts to National Weather Service river forecast center could leave Sonoma, Napa counties ‘flying blind’ ahead of storms

Austin Murphy, PRESS DEMOCRAT

The short-staffed California Nevada River Forecast Center, a small Sacramento field office of the National Weather Service, has outsized importance to North Bay residents. Its operations are imperiled by downsizing and proposed cuts.

The closer you live to the Russian River, the likelier it is you’ve spent time on this no-frills website, whose wavy, colored lines alert users when the river is approaching flood levels, and when it will recede.

The site is maintained by the California Nevada River Forecast Center, or CNRFC, under the umbrella of the National Weather Service. It’s one of 13 forecast centers preparing “timely river and flood forecasts” for some 4,000 river locations across the nation.

The California Nevada forecast center is a small field office, based in Sacramento. But its work has outsized importance to North Bay residents.

The data it collects during heavy rains helps emergency service officials figure out who needs to be evacuated as the region’s largest rivers rise, none packing a more destructive, dangerous punch than the Russian.

The CNRFC also provides information vital to Sonoma Water, the Army Corps of Engineers and other agencies, as they make decisions on when to release water from reservoirs, and how much.

But now, in the face of cuts and attrition engineered by the Trump administration, that office is operating with a little over two-thirds of its usual workforce. Under Trump, staff shortages have become endemic in offices throughout the National Weather Service.

SuzanneJanuary 13, 2025January 13, 2025Land Use, WaterFEMA, flood zones, flooding, insurance, Russian River, Russian River estuary

Russian River communities feel blindsided by recent changes to flood zones

Marisa Endicott, PRESS DEMOCRAT

☛ Permit Sonoma webpage with FEMA Flood Hazard & Zoning Update Map

A change to federal flood zones could affect insurance rates, property values and building, especially along the lower Russian River.

Nick Schwanz went to a Sonoma County Board of Supervisors meeting in November to weigh in on a particular agenda item.

He was surprised to learn, however, that another item, which appeared to be a routine and technical set of zoning adjustments, actually carried huge implications for his community.

Schwanz, a board member of the Russian River Chamber of Commerce, quickly pivoted and became one of the few to comment on an apparent change to the federal flood zones that could affect insurance rates, property values and building especially along the lower Russian River.

“As far I know this isn’t on anybody’s map,” Schwanz said.

Supervisors, too, seemed taken by surprise.

“This was sort of framed to me as technical corrections, and honestly the way the data was presented made it impossible to see the bigger picture,” said Fifth District Supervisor Lynda Hopkins, who represents much of the affected area. “When we have constituents coming to us who received a notice in the mail yesterday and have no idea what it means, that’s a failure of community engagement. That’s a failure of communication, and we need to do better. I can’t in good conscience vote on this.”

At issue was a new study by the Federal Emergency Management Agency of flood hazards in the Russian River Watershed, the first update in 30 years. The maps are used to determine flood risks and insurance requirements and must be adopted by counties to participate in the National Flood Insurance Program.

SuzanneApril 17, 2024April 17, 2024Waterdrought, flooding, Lake Mendocino, Lake Pillsbury, Lake Sonoma, water supply, weather forecasts

Op-Ed: Saving rainwater for sunny days to come

Grant Davis, PRESS DEMOCRAT

The current water year, which began Oct. 1, has been wetter than usual, with the Russian River watershed accumulating 119% of the yearly average rainfall, totaling 49.38 inches since October.

In the past, we might have celebrated our good fortune and watched lake levels rise only to watch much of it sent downriver to the Pacific Ocean as reservoirs reached an inflexible upper threshold. Today, we get to continue enjoying that ample rainfall long after summer sunshine arrives.
Empty
Grant Davis

With almost a decade of data under its belt, the Russian River Forecast-Informed Reservoir Operations program has been making great strides by demonstrating the viability of this strategy to operate reservoirs more effectively using modern technology and forecasting.

This year, we expect the new method to ensure an additional 19,000 acre-feet of water in the Lake Sonoma reservoir heading into the summer, just as it did last year, thanks to our ability to leverage weather forecasting techniques and adapt how we manage our reservoirs. Add to that another 9,000 acre-feet stored in Lake Mendocino. An acre-foot equates to 325,851 gallons.

That 28,000 acre-feet represents a substantial savings, or almost 65% of Sonoma Water’s annual demand, given that the agency is projecting its three-year average annual water sales to be just under 43,000 acre-feet.

SuzanneSeptember 18, 2022September 21, 2022Climate Change & Energy, Habitats, Transportation, Wildlifebike lanes, bike/pedestrian bridge, flooding, habitat restoration, Highway 37, marsh migration, San Pablo Bay, sea level rise, wetlands

Hwy. 37 could be under water by 2050. Here’s how Caltrans plans to keep traffic flowing

Colin Atagi, NORTH BAY BUSINESS JOURNAL

The favored plan also proposes the route have a 60 mph speed limit, as well as two lanes in each direction with bicycle and pedestrian paths. The plan is in its early stages and officials haven’t identified a cost or funding source.

Caltrans, in order to keep traffic flowing decades from now, intends to build an elevated road along Highway 37 to combat rising water levels, which are expected to eventually inundate the North Bay arterial.

The proposed project essentially stretches across the existing route along San Pablo Bay and through Marin, Sonoma, Napa and Solano counties.

It preserves travel patterns, allows landward marsh migration and is resilient to sea level rises, officials said in explaining its benefits.

SuzanneAugust 11, 2022August 15, 2022Land Use, Transportationflooding, habitat restoration, Highway 37, levees, sea level rise, tidal ecosystem, tidal flow, wetlands migration, wetlands restoration

Wetlands advocates work to raise Highway 37

Dan Ashley & Tom Didion, ABC7 NEWS

There’s a vocal debate over building a better Bay Area, by building a better highway. At stake is not just traffic, but potentially vast stretches of restored wetlands.

When Kendall Webster gazes across the levees and farmland in southern Sonoma County, she can envision the tidal marshes that once flushed water back and forth from meandering waterways to San Pablo Bay.

“And so this whole flatland here was a mosaic of tidal wetlands,” she explains.

It’s a vast expanse of wetlands that the Sonoma Land Trust and their partners are working to restore.

“And you know, California is investing in climate, the way no other state in the country is right now. So we think that this is the natural infrastructure project that the state should be highlighting,” Webster maintains.

To make that vision a reality, the Trust has joined with Save the Bay and more than a dozen environmental and land management groups, urging Cal/Trans and the state to remove the one barrier that could open up natural marshland across the entire North Bay.

SuzanneDecember 27, 2021August 3, 2022Climate Change & Energydisaster response, FEMA, flooding, weather, wildfires

Rescuing FEMA (and ourselves)

Dan Farber, LEGAL PLANET

FEMA needs to grow in order to handle its work. The need for growth will only get greater as time goes on.

2021 was a year of disasters, with extraordinary heat waves, fires, a string of hurricanes, a cold snap that left Texas in the dark, winter tornados, and torrential rains. FEMA has been left badly overstretched. That’s an urgent problem, and it’s likely a foretaste of the future.

This is not just a problem for the overloaded folks at FEMA. It’s a problem for all of us, in an era where disasters are coming fast and furious.

The agency is stretched very thin indeed, with duties ranging from assisting with the care of detained migrant children, responding to COVID, supervising funding for rebuilding from past storms, and preparing for the upcoming season of wildfires and hurricanes. In May, according to the NY Times, “just 3,800 of the agency’s 13,700 emergency workers are available right now to respond to a new disaster,” about a third fewer than last year. The problem, the Times says, was not so much a lack of funding as a lack of staff.

Some of FEMA’s current assignments, like COVID response, are temporary. There’s every reason, however, to expect the pace of disaster situations to increase rather than slow. There are three reasons.

First and foremost, there’s climate change, which will result in an increase in the frequency and intensity of extreme weather events. The increase in frequency also means that there will be a greater number of disaster clusters, meaning that FEMA will be faced with multiple major disasters in short spans of time. The increased severity of disasters will also complicate and extend the post-disaster response, requiring corresponding commitments of staff by FEMA.
Continue reading “Rescuing FEMA (and ourselves)”

SuzanneDecember 8, 2021December 12, 2021Climate Change & Energy, Forestsclimate adaptation, flooding, wildfires

Greenbelt Alliance announces its Resilience Playbook

GREENBELT ALLIANCE

The Resilience Playbook is your go-to guide for accelerating equitable adaptation to the climate crisis in the Bay Area. It offers a holistic approach to advancing solutions that address overlapping environmental, economic, and social challenges. The Playbook brings together curated strategies, recommendations, and tools to support local decision-makers and community leaders wherever they are in their journey.

Go to website: https://resilienceplaybook.org/

SuzanneNovember 16, 2021November 19, 2021Habitats, Wildlifebeavers, detrimental species, flooding, Sonoma Creek, water table

Sonoma Valley advocates push for reintroduction of beavers

Cole Hersey, NORTH BAY BOHEMIAN

On the southwest side of the City of Sonoma, a small stream named Fryer Creek cuts through a quiet neighborhood.

In late October, the creek was, like most waterways in the Bay Area, inundated with water during the “bomb cyclone” storm. However, as the rains pounded Sonoma with seven and a half inches of rain, Fryer Creek stayed fairly tame for the beginning of the storm, according to nearby residents Barabara and Larry Audiss.

“The water was really low [during the storm], even with the heavy rain, and then all at once the water was extremely high,” Larry Audiss said. “We went up and you could see where the dam had been breached.”

Larry Audiss is referring to a beaver dam close to MacArthur Street. The waters proved too strong for part of the recently built dam along this tributary of Sonoma Creek, likely pushing more water downstream.

This was not the only beaver dam in Sonoma Valley that was affected by the storm. In upper Sonoma Creek, most beaver dams were leveled by rushing waters.

However, the three beaver dams along Fryer Creek remained largely intact after the storm, perhaps due to the smaller size of the waterway. Even the dam that was breached could be rebuilt come next spring.

SuzanneOctober 26, 2021November 3, 2021Waterdrought, flooding, Sonoma Creek, water supply

Rainstorm in review

SONOMA ECOLOGY CENTER

From bone-dry creek beds to rushing water in just one wet week – it’s been a turbulent ride of literal highs and lows for our watershed in the past seven days.

Last Sunday’s storm was the biggest in our area’s history in terms of volume of water over such a short amount of time. When you look at the numbers it makes quite the splash.

On the Sonoma Developmental Center campus where the Sonoma Ecology Center is located we received a total of 12 inches in 24 hours – when you factor in the 2.75 inches of rain that we measured prior to the Sunday, October 24 weather event we’re clocking in at 14.75 inches for this year. This is more than we received in precipitation all of last winter, all in just one week!

The huge fluctuations in streamflow which you can see represented below by a USGS streamflow graph of Sonoma Creek at the Agua Caliente Bridge aren’t a typical start to the wet season. In a couple of days Sonoma Creek went from running at 0 CFS (cubic feet per second) to well over 6,000 CFS. That’s a big change in a short amount of time.

Environmental Center of Sonoma County

Tag: flooding