[11][12] Canadian Fisheries and many communities within the region such as: Alexis Creek, Hanceville, and the Tŝilhqot’in Nation depend on the diversity of Chilcotin River.

[10] The assemblages share similar lithology, an unconformity overlain with sedimentary sequences from the Triassic-Jurassic Periods, and a structural relationship with the overlying Cache Creek Complex.

[21] Approximately 80 km (50 mi) from the Coast Range at altitudes of 3,500 to 4,200 feet, water is gathered from small creeks and lakes.

[29] Climate Data Canada considered a high emissions scenario to identify annual average temperature projections.

[12] The annual migration of salmon in these rivers are relied upon by the Tŝilhqot’in to sustain their communities year round; as a food resource, cultural staple, and economic subsidy.

[14] To ensure salmon come back after every fishing season, the Tŝilhqot’in National Government (TNG) and the Canadian Department of Fisheries and Oceans (DFO) practice sustainable harvesting and monitor the rivers regularly.

[12] However, progressively smaller harvesting outcomes in recent years followed by an assessment done by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) has prompted the TNG to shut down their fishery operations for 2021 and presently, fishing in the Chilcotin River has seized.

[31] The Chilcotin River supports populations of coho, chinook, and sockeye salmon, the first two of which are considered threatened by COSEWIC.

[14] The Chilcotin River hosts a genetically distinct population of steelhead trout (Oncorhynchus mykiss).

[17] COSEWIC conducted a rarely-used emergency fast-track assessment of the Chilcotin River steelhead in February 2018, after only 58 individuals returned to their spawning grounds in the previous fall, representing a decline of 81% and an all-time low.

[17] Population declines are a result of factors such as interception by fisheries and competition with hatchery species while out at sea, as well as predation by pinnipeds.

The risk of fast-moving water and debris, which included mature trees, led to emergency alerts and evacuation orders along both the Chilcotin and Fraser Rivers.

NASA reported that by 6 August, the Fraser River water levels had peaked at 3,640 cubic metres per second, which was a sharp increase but not a record breaker.

[40] The debris reached the Strait of Georgia west of Vancouver, an arm of the Salish Sea of the Pacific Ocean, on August 9.

[16] British Columbia experiences recurring outbreaks of mountain pine beetle (MPB) populations, with the largest infestations occurring in central BC.

[18] MPB causes widespread tree mortality that also raise the risk of wildfire and poses a substantial threat to the timber supply industry.