The updated guidelines indicate officials are finding higher concentrations in these areas and species. Officials warn of ...

Near the southern flank of Mount Shasta, springs and snowmelt converge to form the McCloud River. This Sacramento River tributary, held sacred by the Winnemem Wintu tribe, teemed with Chinook salmon ...

Pink salmon, purple Asian clams, marine invertebrates that form spaghetti-like colonies and a nematode worm that causes ...