Augusta Aquatic Center stays compliant with National Lightning Institutes' (NLSI) Section 4.8 Lightning Safety at Swimming Pools (applies to indoor / outdoor pools):
Lightning’s behavior is random and unpredictable. We recommend a very conservative attitude towards it. Preparedness and quick responses are the best defenses toward the lightning hazards.
Swimming pools are connected to a much larger surface area via underground water pipes, gas lines, and electric and telephone wiring. Lightning strikes to the ground anywhere on this metallic network may induce shocks elsewhere.
Designate a responsible person as the weather safety lookout. That person should keep an eye on the weather. Use a weather radio, the Weather Channel, or other TV programs to obtain good localized advanced weather information.
When thunder and/or lightning are first noticed, use the Flash to Bang (F-B) method to determine its rough distance and speed. This technique measures the time from seeing lightning to hearing associated thunder:
For each 5 seconds, from F-B, lightning is 1 mile away. Thus, 10 seconds = 2 miles, 15 seconds = 3 miles, and 20 seconds = 4 miles.
At a F-B count of 30, the pool should be evacuated. People should be directed to safe shelter nearby.
Pool activities should remain suspended until 30 minutes after the last thunder is heard. The distance from Strike A to Strike B to Strike C can be from 5-8 miles away, and it can strike much farther away.