The Salvation Army says it is activating disaster response teams and mobile feeding units to help residents and rescuers in Moore.
The organization said Monday that its Arkansas-Oklahoma division is supplying the teams.
The Red Cross is sending similar assistance. It is also working to link loved ones in Moore who are OK connect through a website called Safe and Well. The site is: www.safeandwell.org
People can enter their information on the site or use a search feature to see if their loved ones are listed.
The Red Cross in Oklahoma City says it is opening a shelter at St. Andrews Church at Southwest 119th and South May. The city is also using the location as a reunification site.