Be in a safe building or vehicle and remain there until thunder is no longer heard. The pool filter room is not safe due to the water and plumbing. Blue sky, sunshine or lack of rain is not a reason to return to the pool area. The pool environment is extremely vulnerable to lightning strikes. Every pool should have an evacuation plan and recognize when a lightning threat exists.
Planning is extremely important in saving lives.
Remember that your plan has to adapt for your pool s peculiarities and that the safety rules below are general in nature. If dry buildings are distant or unavailable, the pool may be evacuated when lightning is seen or thunder is heard. Some pools will be able to track storms from far away and will have more lead time before evacuating. If a very dark and ominous cloud develops near the pool, the staff might close the pool until the threat of a first lightning strike from that storm has passed or the cloud appears to have weakened in intensity. Do not depend on a severe thunderstorm warning to clear the pool.