Bowed laminate flooring on slab: How to proceed?
My first thought is that laminate flooring on top of concrete is seldom a good idea, especially if you're in an area where basements are common. There are ways to make it work, all of which require some subflooring and a waterproof membrane, but one of the cardinal rules of carpentry is that wood does not touch concrete, for exactly the reason you are seeing; concrete absorbs water, and will wick it into the wood which will then swell (and eventually rot, if it cannot breathe). You also cannot nail directly into the slab, so forget about the standard installation method with a flooring nailer to secure the planks. So, if you are going to stick with the laminate, you MUST have a waterproof but breathable barrier such as TyPar or Tyvek between the concrete and any wood product. That may include running it up the side of the wall for a few inches either behind the baseboards or even behind the drywall of the room. A plastic sheet such as vapor barrier is a no-no; it will trap both water and air, preventing the wood breathing and accelerating rot if and when water does get under it. You should probably also have an OSB subfloor, so you have something to nail the boards down into.

If all of this is present under your floor and the floor is still bowing, I would go ahead and pull up your baseboard and check the expansion gap. There should be AT LEAST 1/4" between the sides or ends of the board and the wall. I would also feel the drywall and/or studs behind that; do they look or feel damp? If so, your problem is actual water leakage; water is somehow soaking or leaking through the roof or exterior wall in this area and dripping or seeping down to the floor. To fix the floor, you must first fix the leak, or it's just going to happen again with the next heavy rain.