The sun rises over the tundra, Wednesday, Aug. 7, 2024, near Churchill, Manitoba. (AP Photo/Joshua A. Bickel)

Geoff York, left, director of research at Polar Bears International, and Kieran McIver, right, manager of field operations, look for polar bears along the shoreline of the Hudson Bay, Sunday, Aug. 4, 2024, near Churchill, Manitoba. (AP Photo/Joshua A. Bickel)

A polar bear walks along rocks, Tuesday, Aug. 6, 2024, near Churchill, Manitoba. (AP Photo/Joshua A. Bickel)

Water from the Churchill River, left, drains into the Hudson Bay, top right, Thursday, Aug. 8, 2024, in Churchill, Canada. (AP Photo/Joshua A. Bickel)

Tourists observe as a polar bear walks along the shoreline of Hudson Bay, Tuesday, Aug. 6, 2024, near Churchill, Manitoba. (AP Photo/Joshua A. Bickel)

Fireweed grows near the Hudson Bay, Sunday, Aug. 4, 2024, in Churchill, Manitoba. (AP Photo/Joshua A. Bickel)

A sign alerts drivers to potential polar bears, Wednesday, Aug. 7, 2024, in Churchill, Manitoba. (AP Photo/Joshua A. Bickel)

Flavio Lehner, center, chief climate scientist at Polar Bears International, rides in a boat while looking along the Hudson Bay shores for polar bears, Monday, Aug. 5, 2024, near Churchill, Manitoba. (AP Photo/Joshua A. Bickel)

A polar bear cub walks along rocks toward its mother, Wednesday, Aug. 7, 2024, near Churchill, Manitoba. (AP Photo/Joshua A. Bickel)

A polar bear nurses her cub, Wednesday, Aug. 7, 2024, near Churchill, Manitoba. (AP Photo/Joshua A. Bickel)