In San Jose, Calif., just under 10 percent of the city’s firefighters, some of whom also help battle the state’s wildfires, this week found themselves either infected with the coronavirus or in quarantine. And firefighters across the country, in states including Georgia, Indiana and Washington, are under quarantine amid the coronavirus crisis. …Much of the Western United States remains under drought conditions as fire season, which typically ramps up in mid-May and lasts through November, approaches. …Firefighters are finding themselves squeezed from both sides: their close living and working conditions often allow for viruses to spread, but if they are subject to a quarantine, they are not available for emergency calls.