Here is a picture of a piano moved from New Hampshire to Rexburg via a month stay in a hot humid storage warehouse until enough pallets accumulated before furniture and other possessions could be moved to Rexburg.
Yes...wood, plastic, steel, felt, paper, leather, glues, and alike, expand and contract at different rates. As seen in the above picture they don't automatically go back into place once removed from a harsh environment for pianos. Below is a pic of the piano repair after piano key squaring, spacing and leveling, and regulating lost motion, key dip, after touch, let off, back checks, and rubbing hammers.
To extend the enjoyment and life of your piano by keeping your piano at an ideal temperature and humidity, we recommend installing the Piano Life Saver System from Dampp-Chaser**. Click on the pic below for more information.