SEATTLE -- How water flows in cities affects salmon swimming far away. An event this week is exploring how urban centers can better treat their water to protect these iconic Northwest species.

Salmon in the City is an online presentation that will look at approaches to architecture that keeps water clean for aquatic species.

Anna Huttel, certification director for Salmon-Safe, the organization promoting best conservation practices hosting the event, said one of the options cities can use to treat stormwater is planters.

"Bio-retention offers that above-ground visibility to inspire folks," Huttel pointed out. "As well as the opportunity to use plants to help to treat pollutants in the stormwater, provide habitat through the vegetation and really just provide something that's beautiful to look at as well. "

The event begins at 5:30 p.m. Thursday with presenters including Huttel and Brook Muller, Dean of the College of Arts and Architecture at the University of North Carolina-Charlotte. She will speak about sustainable architectures and climate-adaptive urban landscapes.

Huttel stressed her organization focuses on salmon because they are like canaries in the coal mine for habitat health, but Salmon-Safe could just as easily be called "water safe" because practices that are good for salmon are good for other species as well.

"Thinking about how these principles can help downstream, even if you can't see a water body from a site that you are influencing, everything has a trickle-down effect, reaches a larger water body and touches another part of the ecosystem," Huttel outlined.

Huttel also noted salmon are imperiled, affecting another iconic species of the Northwest: orcas. The whales, which live off the West Coast, rely on salmon for their diet and have increasingly struggled to find the food they need to survive.

BOISE, Idaho -- Closed fisheries from imperiled fish runs in the Columbia River Basin are prompting calls for action before it's too late.

Steelhead trout numbers in the Columbia and its tributaries could be the lowest since records began in the 1930s. On the Columbia, the Oregon Department of Fish and Wildlife issued an emergency closure on salmon fishing up to the Bonneville Dam.

Brian Brooks, executive director of the Idaho Wildlife Federation, said low salmon and steelhead numbers present an existential crisis for people in the industry.

"Idaho guides and outfitters, if they want to stay in the fishing industry, they have to leave their home," Brooks observed. "They have to go out of Idaho to stay in the industry, and if they don't want to leave their home, then they have to leave the industry."

Brooks applauded Republican Idaho Congressman Mike Simpson for his $33 billion proposal to save endangered species, which includes removing the lower Snake River dams. Other leaders in the region have supported habitat improvements in Congress's infrastructure package, but have not moved to include Simpson's proposal in the package.

Marcia Brownlee, program manager of the Artemis Sportswomen initiative for the National Wildlife Federation, said the region has taken half-measures to save endangered fish for too long.

"We need to do everything in our power to make sure emergency closures do not become permanent closures," Brownlee urged. "And what we've seen this summer has really illustrated that what we're doing now isn't enough. We need to do more."

Brownlee recommended the first step should be removing four lower Snake River dams in southeast Washington.

Earlier in the year, Rep. Cathy McMorris Rodgers, R-Wash., and Dan Newhouse, R-Wash., praised spring Chinook salmon runs on the Snake River, which were higher than in 2019 and 2020. The members of Congress said it was proof dams and salmon can co-exist.

BANGOR, Maine -- Efforts are under way to restore Atlantic salmon populations in the Gulf of Maine, by removing dams, replacing culverts and restoring streams.

Salmon are what are known as sea-run fish, meaning they live part of their lives in fresh water and part in the ocean.

John Catena, Northeast and Great Lakes region supervisor for the National Oceanic and Atmospheric Administration (NOAA) Restoration Center, said dams across the region have blocked Atlantic salmon's migration paths from the ocean to the river to spawn.

This year, four local Maine projects are receiving $900,000 in funding from NOAA.

"These kinds of activities are meant to recover them such that we can actually have a sustainable population over time," Catena explained. "This is an iconic species that was important to Native Americans to sport fishermen, and to any number of other groups throughout the region."

Catena noted Atlantic salmon are endangered, with roughly 1,000 in the Gulf of Maine, where there used to be more than 100,000. He added these kinds of projects also benefit species similar to Atlantic salmon, including river herring and American shad, which also have low populations.

Catena pointed out dam-removal projects have implications beyond removing blockages to fish migration, and many present liability issues for local communities.

"They continue to cause other problems," Catena outlined. "They can degrade water quality, increase the water temperatures, exacerbate local flooding. And so these are oftentimes left to dam owners that don't have the means to deal with them."

Catena emphasized federal infrastructure funding also may help improve thousands of dams and culverts throughout Maine. Many are old and degrading former mill structures. A $1 trillion infrastructure bill is in the works in Congress, passed by the Senate and now being debated in the House of Representatives.

BOISE, Idaho -- Rallies are taking place across the Northwest to support salmon, which face dire conditions in the Columbia River Basin.

Saturday, the Rally for the River is calling for action from Congress to save endangered fish species in the region, including removing four lower Snake River dams that impede salmon migration and heat up the river.

Brett VandenHeuvel, executive director of Columbia Riverkeeper, said his group recently captured video of the sockeye salmon struggling in the warm waters of the Columbia.

"The heartbreaking video of the sockeye covered in lesions and fungus should sound an alarm," VandenHeuvel asserted. "We need action now from the Northwest delegation."

Water temperatures above 68 degrees can be lethal for salmon, and the Columbia has already been above 70 degrees this year. VandenHeuvel pointed out high temperatures stress salmon metabolism and leave them more susceptible to predation and disease.

He predicted the situation will only get worse unless leaders act to remove the Snake River dams.

Betsy Emery, advocacy and campaign manager for the Association of Northwest Steelheaders, said anglers contribute $5 billion per year to the Pacific Northwest's economy, but she fears salmon in the basin are at a tipping point.

"A lot of us who spend time on the river and spend time thinking about these fisheries are really nervous," Emery remarked. "Could this be that catastrophic event that starts pushing some of these runs that we love so much, from a fishing perspective, into a space where they might not be strong enough to fish?"

VandenHeuvel added people are becoming inspired to take action.

"More and more people are getting involved and recognizing how serious and urgent this issue is," VandenHeuvel contended. "For salmon, for the orcas that depend on them, for the people of the Pacific Northwest."

Rallies are planned for Boise, Corvallis, Eugene, Portland, Seattle and Spokane on Saturday.