If a ball bursts or loses significant air due to temperature fluctuations, this does NOT fall under warranty, is not a reason for complaint, and no exchange or refund can be offered!
The ball should only be inflated to game pressure during direct use. Otherwise, release some air. It should not be left in direct sunlight (e.g., at the beach or behind a window), as this can cause the ball to burst. The same result can occur if the ball is played in cold temperatures and then stored in warmer rooms. The air inside would expand, potentially damaging the bladder.