A Dene Nation water summit being held this week has taken on new urgency as delegates deal with the fallout from Imperial Oil’s Kearl tailings spills. The northern Alberta oil sands mine continues to operate but has now been ordered by the federal government to take immediate action to stop months-long seepage of wastewater. A separate release of millions of litres of tailings at the same site was also revealed last month.

A group of B.C. First Nations are calling on Australian mining giant Rio Tinto Alcan to release more water into the Nechako River after a sudden die-off of endangered white sturgeon. Last month, B.C.’s Ministry of Land, Water and Resource Stewardship reported 11 dead adult white sturgeon had been found in the Nechako River — an unusual occurrence. White sturgeon can grow to six metres long and live more than 100 years. They are an endangered species with between 300 and 600 remaining in the wild. Scientists said the fish had not died from disease, chemical exposure or due to fishing, and had no signs of injury. The government then reached out to local First Nations.