If water has seeped into the boards they may swell against one another which can cause the bow.
How to fix bowed wood flooring.
Cover the warped hardwood specifically the concave portion of the wood with moist paper towels.
Again to bring the wood back to its normal shape you must concentrate on the concave section.
This works best for warps that come from humidity or a water spill rather than from a leak that originated below your flooring.
Warping manifests as gaps between the boards.
Wood floors usually become warped because of water damage although too much sunlight can also cause boards to warp.
Sand down the bump in your flooring until it is level with the rest of the floor.
How to straighten a warped floor.
Many floor boards that are warped will need to be removed and replaced.
Sanding down a warped floor.
The first method to fix a warped floor is to sand it.
Most often a warped wood floor is caused by standing water or heavy moisture below the floor due to an unidentified leak or other hidden water source.
How to fix bowed floors.
Just like in the other methods you should rinse the paper towels under water and wring out the excess.
Over the course of time this will lead to warping.
Bowing or warping of floor boards can occur for several reasons.