Before you go through all the trouble of pulling everything up, why not just take a circular saw and cut an 1/8" space between the sheets without pulling them up? Obviously, set the blade to the width of the OSB. The first cut along the joint would relieve the stress of the expansion. Add weight to the rises in the board and give it a day to settle back down. If there is still any buckling left, run your circular saw along the seam again, add weight, wait a day, etc....
Might take a couple of days, but shouldn't be as hot to do 10 minutes of cutting versus a full day of prying and relaying the flooring