You can read it here.
And of course, we pray:
God of love, whose compassion never fails; we bring before you the griefs and perils of the peoples of Oklahoma; for the necessities of those left homeless; the helplessness of those torn apart by tornadoes; for the pains of the sick and injured; for the sorrow of the bereaved. Comfort and relieve them, O merciful Father, according to their needs and draw near to each; for the sake of Jesus Christ our Lord. Amen. (Based on a prayer by St Anselm (1033-1109))
Loving Father, you comfort us in times of affliction: Our brothers and sisters in Moore, OK have suffered a great tragedy and they need your healing. Send your Holy Spirit to soothe the anger, fear, and sorrow of their broken hearts. In the darkness of this moment, shine the light of your radiant love. Be their companion in their grief. In their pain, make them strong in courage, dry their tears, mend their hearts, and gently call them to newness of life. We thank you for the assurance of your love, shown in your Son Jesus, who suffered for us, died, and rose again to prepare our place in your eternal home. Amen. (From an unknown source)