Officials said there is no more need for civilian volunteers. However, water donations are needed because conditions are so harsh.
Devon is 30 inches tall and weighs 40 pounds with red hair and blue eyes. He was last seen wearing a red and gray jersey T-shirt, jeans and Spiderman tennis shoes.
The Davis family has only lived in their home a week. They moved to the area from Virginia.
Anyone with information regarding Devon's whereabouts is asked to call the Liberty County Sheriff's Office at 936-336-4500.