Fish injured, nearly dying from hot water in US river due to heatwave

Underwater video footage released by non-profit organisation Columbia Riverkeeper has captured heat-stressed sockeye salmon injured and nearly dying because the US' Columbia River is too hot due to heatwave. The video shows the salmon with lesions and fungus, which affects fish subject to thermal stress. On July 16, 2021, when the video was taken, water temperatures breached 70°F (21°C).