A view of the Yukon River near the Canadian border and Eagle, Alaska, U.S., March 31, 2021. Picture taken March 31, 2021. REUTERS/Nathan Howard 

The tribal village is seen along the Yukon River in Eagle, Alaska, U.S., March 31, 2021. Picture taken with a drone on March 31, 2021. REUTERS/Nathan Howard 

A view of the Yukon River near the Canadian border and Eagle, Alaska, U.S., March 31, 2021. Picture taken March 31, 2021. REUTERS/Nathan Howard 

The tribal village is seen along the Yukon River during the coronavirus disease (COVID-19) pandemic in Eagle, Alaska, U.S., March 31, 2021. Picture taken with a drone on March 31, 2021. REUTERS/Nathan Howard 

A river flows from a lake fed by the Melburn Glacier in Tatshenshini-Alsek Park, as seen during a flight over northwest British Columbia October 7, 2014. Tatshenshini-Alsek park contains one million hectares (2.8 million acres) of wilderness in the northwest corner of British Columbia and lies between Kluane National Park and Reserves in the Yukon and Glacier Bay & Wrangell-St. Elias National Parks and Preserves in Alaska. REUTERS/Bob Strong (CANADA - Tags: ENVIRONMENT TRAVEL)

A boat carrying Canada's Prime Minister Stephen Harper passes through Miles Canyon on the Yukon River near Whitehorse, Yukon August 21, 2014. Harper is on the first day of his annual tour of Northern Canada. REUTERS/Chris Wattie (CANADA - Tags: POLITICS ENVIRONMENT) 

Canada's Prime Minister Stephen Harper (R) and his wife Laureen ride a boat on the Yukon River at Miles Canyon near Whitehorse, Yukon August 21, 2014. Harper is on the first day of his annual tour of Northern Canada. REUTERS/Chris Wattie (CANADA - Tags: POLITICS) 

Canada's Prime Minister Stephen Harper rides a boat on the Yukon River at Miles Canyon near Whitehorse, Yukon August 21, 2014. Harper is on the first day of his annual tour of Northern Canada. REUTERS/Chris Wattie (CANADA - Tags: POLITICS ENVIRONMENT) 

Canada's Prime Minister Stephen Harper looks at the Hayes River from the cockpit during a fly past of the York Factory national historic site on route from Whitehorse, Yukon to Ottawa August 27, 2010. REUTERS/Sean Kilpatrick/Pool (CANADA - Tags: POLITICS)