The Oklahoma Red Cross is asking people to donate by texting Red Cross to 90999 which will be a $10 donation, spokesman Ken Garcia said.
Garcia said the donations allow the Red Cross purchase needed supplies.
Those who are looking for family members can visit the Safe and Well page of the Red Cross website, Garcia said.
"We're still assessing what we need and where we will be setting up shelters," Garcia said. "We obviously don't want to get in the way of rescuers and we want to make sure it is safe but we know this will be a national relief effort."