The Central California Blood Center says the recent string of deadly car accidents in the Central Valley has created a critical demand for donations.
Just in the last week, four people have been killed in car crashes, and dozens have been injured and in need of life saving blood donations.
The blood center says the massive pile-up on Highway 99 - demanded most of their supply.
One crash victim can require up to one-hundred units of blood--and with the testing required before the blood can be redistributed, the center says it's left playing catch-up.
"It takes about a day and a half before it gets to the hospital, because it has to go through testing," said Abby Minong. "It actually goes to 14 different types of tests before it's, you know, it gets the green light to go to the hospital."
If you would like to take action and donate-- you can schedule your donation time on the Central California Blood Center's website.