(Portland, OR) -- More Kaiser Permanente workers in the Portland area could go on strike tomorrow. Thousands of Kaiser Permanente employees across the country are prepped to strike on Wednesday if negotiations don't improve with the company. The workers say they're protesting unfair labor practices and unsafe staffing levels. Strike lines will be set up at 6 a.m. Pacific Time Wednesday at Kaiser Permanente hospitals and medical office buildings across the country, including California, Colorado, Washington, Oregon, Maryland, Virginia and Washington, D.C. Kaiser Permanente pharmacy employees with labor union UFCW Local 555 in the Portland area started a separate 21-day strike on Sunday.