TUCSON, Ariz. — More southern Arizona Red Cross volunteers flew out of Tucson Monday.
Thee volunteers are going to Columbia, and South Carolina.
Last week, four volunteers flew out o f Florida, this weekend the Red Cross sent it's emergency response vehicle to Alabama.
More than 600 Red Cross volunteers across the country are heading to the south to help.
Now, they're watching Dorian's unpredictable path, and collecting enough blood donations that could be needed.
Red Cross volunteer Don Speck says "Blood drives might be canceled...as well, and typically summers are a time when more people are on vacation. They don't have ability to donate blood so it's an ongoing thing that we are always challenged with."