( CNN ) -- Several days in a row , violent storms ripped through America 's heartland with the most devastating hitting on Monday . Much of Moore , Oklahoma , which is just outside of Oklahoma City , is now a devastated pile of rubble . The rescue and recovery efforts continue and the clean up has begun after a massive tornado touched down Monday afternoon . CNN affiliate KFOR reported that at one time , the tornado was estimated to be at least 2 miles wide , and the National Weather Service said the tornado was an EF5 , the most severe rating for a tornado on the scale . It is clear the days ahead are grave for the people of Oklahoma and the need for help will be immense . There are several organizations already mobilizing on the ground in Moore , and you can help as well through these groups : . Emergency care : . The Red Cross . The Red Cross of Oklahoma has activated its `` safe and well '' website for those who are trying to reconnect with loved ones . Red Cross officials and volunteers are also beginning to open shelters . There are a handful open now and this map provides location information . You can help their efforts by donating to the Red Cross online or by texting REDCROSS to 90999 . This will automatically charge $ 10.00 to your cell phone bill . In addition to shelter and emergency care , the Red Cross is also providing hot meals to those affected . They are operating fixed feeding sites at the Little Axe Resource Center Carney Oklahoma Senior Center and in Shawnee at the Shawnee Expo Center located at 1700 W. Independence , Shawnee , Oklahoma , 74804 . If you are outside of the U.S. and wish to contribute to the efforts of the Red Cross , please visit their international partner International Federation of Red Cross and Red Crescent . Samaritan 's Purse . Samaritan 's Purse deployed a group of staff members to travel from its North Carolina headquarters to head to Oklahoma with a Disaster Relief Unit . The unit is a tractor trailer stocked with emergency supplies and equipment . AmeriCares . Global health and disaster relief nonprofit AmeriCares has an emergency response team helping in Oklahoma . They will coordinate aid deliveries and assess the needs of survivors and medical organizations in the area . Team Rubicon . Team Rubicon , a group of military veterans who respond to disaster , have issued the call to members and is heading to the region . By Tuesday morning , initial assessment teams will be on the ground , and they will then mobilize a full response to help the people affected by these storms . Food and Shelter . The Salvation Army . The Salvation Army has also jumped into action . It 's in multiple locations throughout cities in Oklahoma providing food , hydration and emotional support to first responders and storm survivors . You can contribute to the Salvation Army by calling 1-800-SAL-ARMY ( 1-800-725-2769 ) , online on their website , by texting `` STORM '' to 80888 to make an automatic $ 10 donation or by mail : . The Salvation Army . PO Box 12600 . Oklahoma City , Oklahoma , 73157 . Feeding America . Feeding America is responding by providing food , water and supplies to the residents of the devastated towns in Oklahoma . The group will continue to assess the need on the ground for more assistance as recovery efforts continue . World Vision . World Vision has a team headed into the disaster zone with emergency food kits , blankets , cleaning supplies , hygiene items and tarps . Once the team arrives , they will assess the needs and respond accordingly . Feed the Children . Feed the Children has also mobilized and are sending supplies to families and children in need in Oklahoma . You can also help their efforts by making a monetary donation . Regional Food Bank of Oklahoma . The Regional Food Bank of Oklahoma , in partnership with Oklahoma Voluntary Organizations Active in Disaster ( VOAD ) , is asking that the public support all rescue , recovery and disaster relief efforts by making cash donations . Donations of items such as clothing and supplies are strongly discouraged . Give blood . The Oklahoma Blood Institute . As the recovery efforts progress and more and more of the walking wounded are found the need for blood donations increases . Many of the injured will require blood to help in their recovery . The OBI team says they are particularly seeking O-negative and Rh-negative blood types . If you are local in Oklahoma you can donate here . Outside of the immediate area , please donate to your local blood bank which will help replenish the national supply . You can find your local center through the Red Cross . Heartbreaking scenes in Oklahoma City after the twister . Help injured or displaced pets . The Humane Society of Central Oklahoma . The Oklahoma Humane Society is working with the city of Moore to assess and shelter animals affected by the storms . Many pets are displaced in violent storms like these and the Humane Society is dedicated to make sure these animals get the necessary immediate care they need . They ask now for monetary donations to help their efforts but will update their page with volunteer and in-kind donations as they get a better grasp on the supplies , food and medical assistance needs .
Oklahoma suffered a second day of devastating storms Monday . A massive tornado demolished much of Moore , Oklahoma , just outside of Oklahoma City . There are many fatalities and more expected as search and rescue continues . Several organizations have mobilized to help the survivors .