AUSTIN, Texas -- Austin-based We Are Blood is working to send blood to the Carolinas.

The organization said blood banks are often unable to operate for weeks after a hurricane, so they rely on others across the country for help.

When Hurricane Irma hit, We Are Blood sent 780 units of blood to Florida. Blood donation centers are most in need of O-Negative and O-Positive blood.

They're asking people to donate so Austin is stocked and ready to supply patients in the Carloinas.