OKLAHOMA CITY - The American Red Cross is facing a critical shortage in their blood supply.

The organization says its national blood supply is at its lowest level in 15 years because of severe weather and a slow summer of donations.

Severe storms in early July forced the cancellation of dozens of blood drives. And the extreme heat has kept donors indoors and at home.

If things don't turn around doctors may have to cancel elective surgeries.

Contact your local Red Cross if you would like to donate.