If a ball bursts or loses significant air pressure due to temperature fluctuations, this is NOT covered under warranty, is not grounds for a claim, and no exchange or refund will be offered.
The ball should only be inflated to playing pressure for immediate use. Otherwise, release some air. Avoid exposing the ball to direct sunlight (e.g., on a beach or behind a window), as this may cause it to burst. Similar damage can occur if the ball is played with in cold temperatures and then stored in a warmer environment, causing the air inside to expand to the point of damaging the bladder.