Vitalant is at critical levels of donated blood and needs help from the community. Officials say there has been a huge decrease in donations for the month of May in Arizona. In Flagstaff, there is a blood drive Thursday at the American Legion Hall at 204 West Birch Avenue. Appointments are available today from noon until 5 p.m. To schedule an appointment to donate blood, or for more information on other blood drives coming up, log on to Vitalant.org.