Blood supply levels in Arizona are critically short as national levels reach a 15-year low.
Blood donations normally taper off summer months, but this year, the situation at the Red Cross is critical and Grand Canyon Chapter spokesperson Debra Deininger said every donations makes a difference.
"if every blood drive brought in just two more donors on top of what they had promised, we would have enough blood to adequately supply the hospitals," she said.
The Red Cross is asking people to spread out their donations in upcoming weeks.
They need all types of blood.