The community blood supply has reached dangerously low levels that could potentially affect patient well-being. LifeStream will hold a community blood drive on Tuesday, July 30, at Little Church of the Desert, 6079 Adobe Road, in Twentynine Palms, from 1 to 6 p.m. All blood types are needed. Donors will have a chance to win a weekly drawing for $2,500. Those aged 18 to 44 years may also register for Be the Match bone marrow screening free of charge. For more information, call 800-TRY-GIVING.