Two orca stories have been prominent in news in recent days: An endangered orca is still clinging to her dead calf more than two weeks after it died. And scientists are considering intervening to help a different young orca, known as J-50, which they fear is sick and near death.

Federal scientists and tribal fishermen have been preparing to take unprecedented action to help an ailing orca whale – if they ever see her again.

A multitude of factors are harming Puget Sound’s local population of endangered orcas: water pollution, noise, loss of habitat. But topping that list right now for many scientists is recovery of their primary food source: Chinook salmon. The tragic scenes captured on the water over the past week – of the grieving orca J35 incessantly carrying her deceased calf, and of 4-year-old J50 ill and starving – are sad events, but not surprising to scientists working on orca recovery. They say they

Seattle is working on changes to its tree protection ordinance. Trees provide shade and clean the air. They’re acknowledged by the City of Seattle for the ecosystem services they provide, which are increasingly called for as the climate warms. An interim law is failing to preserve or increase the canopy. A city council committee is discussing the first draft of a new ordinance Wednesday . Meanwhile, neighborhood groups and other advocates are urging the city to make sure the new rules protect

As the climate warms, oceans expand and polar ice caps melt. This means sea level rise is a reality that land owners and local governments must prepare for. It brings with it associated risks, such as flooding and erosion which can impact everything from sewage treatment plants to roads and bridges. A new report from Washington’s "Coastal Resilience Project" homes in on exactly how high the tides could rise in 171 different sites and communities based on the latest science.

Lakes close because of toxic algae every year, especially as temperatures climb in summer. Pierce County’s Lake Tapps is the latest example . Authorities warned people not to swim in the northeast part of the lake last week. In King County, caution signs remain up at Mallard Lake in White Center, where a sample showed toxicity at levels higher than the state’s guidelines advise on July 10 .

The Canadian government has taken another step towards buying the controversial Trans Mountain pipeline. This is another move in a deal that would lead to a massive increase in oil tanker traffic through Puget Sound and the Salish Sea, made possible by the Canadian government.

Youth activists concerned about climate change are gearing up for protest marches worldwide this weekend. On Saturday, for the second year running, they’ll take part in an event called The Zero Hour that was conceived by a young woman from Seattle. Jaime Margonlin, a student at Seattle’s Holy Names Academy, was inspired by the women’s marches around the country and wanted to do something similar for climate. She’s in D.C. for the main march this year. But the movement she started is growing.

Hot, dry weather is partly to blame for a wildfire in an unexpected place. At San Juan Island National Historical Park, hot metal debris from a historic weapons demonstration on Sunday caused a blaze that quickly spread across parched grassland prairie.

It’s the height of summer and the forecast is looking very sunny, providing great conditions for water sports on local lakes. That also means a higher risk of swimmer's itch, which is linked to another feature of summer that many people enjoy: the presence of waterfowl.