Fishing closures are becoming routine as record heat warms rivers in the U.S. West

Record heat and drought in the U.S. West are forcing fishing closures on rivers and streams to protect fish, especially trout that require cool water. Wildlife officials have limited angling during certain hours as exceptionally dry winter conditions have lowered water levels and allowed rivers to warm faster. The restrictions are aimed at reducing stress on species including highly prized trout. Colorado has imposed limits on 19 rivers totaling 635.5 miles, which officials call unprecedented, while Yellowstone expanded afternoon fishing restrictions across the whole park and Montana widened similar rules to cover 1,200 miles. Authorities cite climate change-driven temperature increases; Yellowstone has restricted fishing during five of the past six years. Local fly-fishing businesses say anglers are shifting trips to fall.