ALBANY — The American Red Cross continues to urge donors of all blood types to act now and make an appointment to give blood amid the ongoing national blood crisis. Since issuing only the second blood crisis in Red Cross history in late July, thousands of generous donors have stepped up to help save lives, the Red Cross said. At the same time, the blood supply remains under severe pressure, just as many communities transition to back-to-school schedules and people enjoy final summer plans. Donors can book an appointment to give blood by using the Blood Donor App, visiting RedCrossBlood.org or calling 1-800-RED CROSS (1-800-733-2767). Those who are unable to donate can still make an impact by encouraging eligible friends, family members and colleagues to give blood, the Red Cross said.