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People should avoid open fields, exposed hilltops, swimming pools, beaches, and other open areas during a thunderstorm. Water activities should stop as soon as thunder is heard. Outdoor workers and sports teams should have a clear plan for suspending activities rather than waiting until the storm is directly overhead.
After the last thunderclap, it is still important to wait before returning outdoors. A commonly recommended safety rule is to remain sheltered for at least 30 minutes after the last thunder is heard, following local lightning-safety guidance.
Inside a building, people can reduce exposure by avoiding contact with plumbing and wired electrical equipment during a storm. Using a connected corded device or handling electrical appliances during lightning activity can introduce unnecessary risk. Battery-powered devices are useful for receiving alerts and communicating when the power supply is unreliable.