Walmart on Sparkman Drive is closed Thursday and possibly Friday after a fire.
The fire, in the arts and crafts area, was brought under control quickly, said Capt. Frank McKenzie, Huntsville Fire & Rescue spokesman.
He said there is standing water in the building covering about 12,000 square feet.
McKenzie said the area burned was about 8 feet in length, 6 feet deep, and 10 feet tall.
Investigators are on scene.