Blood banks in Michigan had much lower donation rates this week due to the weather.
Michigan Blood is a non-profit blood bank that usually collects 2,200 units of blood every week.
Spokesman Jim Childress says this week, donations dropped to 800.
“We do need people to donate at a higher rate than they normally do, and take this very seriously and help out the nation's blood supply,” says Childress.
The group is offering donors $10 Meijer gift cards and expanding its hours of operation through next Friday.