"We're just in the process of right now, trying to see if we have anyone to be rescued along the river there, and uh, also in a recovery stage," said Capt. Fletcher.
Officials were also bringing in a refrigerated truck to serve as a temporary morgue and downstream Glenwood police and fire crews monitored river debris moving beneath a highway overpass.
Two Shreveport, La., families were at the Albert Pike campgrounds when the floods hit, a family friend told ABC affiliate KTBS.
A 5-year-old member of one family was swept away by flood waters and the father and a 2-year-old child were missing, said Tonya Rabalais of Shreveport.
The father of the other family -- which consisted of a husband, wife and three children -- was missing, Rabalais said. The mother of the first family and four members of the second family survived.
The Associated Press contributed to this report.