Smoke from wildfires in Shasta and Siskiyou counties is polluting North State air. And it’s probably not going anywhere over the Fourth of July weekend in Redding and communities north to the California-Oregon border. Siskiyou and Shasta counties on Friday issued health advisories because of wildfire smoke. They're warning people to stay indoors as much as possible, drive carefully and watch out for symptoms of smoke inhalation. While anyone can develop health problems, some groups are especially vulnerable to the effects of smoke, according to a statement issued by Siskiyou County public ...