Salmon Return News Today

>> reporter: how do you know it is climate change? >> so we have decades of air temperature data and water temperature data. >> reporter: ideally the water should be no warmer than 59 degrees. but over the last decade its too warm as much as 92% of the time when the salmon return. >> so you have to have 350,000 sockeye to be able to fish in our watershed and that hasnt happened in almost 15 years. >> reporter: all this means shrinking choices on the menu. king salmon is now a rarity. >> it might...