On Monday afternoon, the Oklahoma City area was struck by a massive tornado. At least 51 people have been confirmed dead, and countless families have been affected by the storm. Below is a list of ways to help victims affected by the storm.

Follow along with our live blog for updates on the situation in Oklahoma.

Donors can give $10 to the Oklahoma Red Cross by texting “Red Cross” to 90999, or they can visit the Red Cross website to donate in larger amounts. People in the Oklahoma City area can sign up to volunteer with the Red Cross's tornado relief here.

The national Red Cross, for its part, is sending in 20 response vehicles to get food and other supplies to victims. Spokesman Ken Garcia told News Oklahoma that additional trailers with supplies are also on route.

“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.”

If you’re searching for a friend or family member who was in the area affected by the tornado, the Red Cross has also set up a Safe and Well page. If you have been personally affected by the tornados, it’s best to register yourself on the Safe and Well page now.

The Salvation Army’s Arkansas-Oklahoma Division has also dispatched responder teams and has asked for donations. Interested donors can contribute online or by phone at 800-725-2769. Checks may be sent to The Salvation Army Disaster Relief, P.O. Box 12600, Oklahoma City, OK 73157 and marked “Oklahoma Tornado Relief.”

At this time, the Regional Food Bank of Oklahoma has asked people not to donate clothing or food, but to instead contribute money. You can text FOOD to 32333 to immediately donate $10.

"Our hearts and prayers go out to all who were affected by the tornadoes that hit Oklahoma," Rodney Bivens, executive director of the Regional Food Bank, said in a statement. "The Regional Food Bank is coordinating efforts with other disaster relief agencies in our state to provide food and water for those in need. What we and other disaster relief agencies will need most from the public is financial donations."

If you are interested in donating blood to help victims of the tornado, the Oklahoma Blood Institute is currently accepting blood donations from anyone 16 and over and healthy. O-negative and Rh-negative blood types are in high demand. Find a blood donation center here.