Sounds like you have a laminate floor that has bowed upward in the middle on one or more boards. If this is installed as a floating floor (not glued or nailed), the problem may be no expansion gap at the floor edges. If this is a floor placed on a slab, the problem may be moisture and failure of the adhesive bond.
At this time of year, Arizona has more moisture and expansion of flooring is more likely to result in buckling. Moisture is the most likely root cause. More details on the flooring, attachment method and subfloor would help.