‘Heat dome prompts early Alberta fish kill’ is a CBC News video from the first week of July. Fish kill is the death of fish from heat stress and low oxygen, says Michael Sullivan, Fisheries biologist, Alberta Environment and Parks in the video. Fish kill is a natural process, but not this early. These fish kills are caused by heat domes, made worse by global warming and fertilizers.
These early fish kills are happening in various Alberta water-bodies. One, the Pembina River, joins the Athabasca River just west of Flatbush, which is at the southern edge of the M.D. of Lesser Slave River. The video doesn’t say where on the Pembina River these early fish kills happened.