The American Red Cross has declared a national blood crisis. It's only the second time in the organization's history that it's made this call, and blood and platelet supplies have dropped to levels the Red Cross considers dangerously low. It's Not Just the Red Cross Sounding the AlarmThe Red Cross supplies roughly 40 percent of the nation's blood. When groups responsible for nearly the entire national blood supply agree the shelves are bare, that's not a routine seasonal dip. For folks in the Wenatchee Valley wondering where to start, the Red Cross website lets you find the nearest donation site and book a slot in a few minutes.