Immediate Actions When Lightning Is Nearby
If you are caught in a lightning storm, move to a substantial building or a hard-topped vehicle as soon as possible. The National Weather Service states that no place outside is safe during a thunderstorm, and you should seek shelter when you hear thunder, see lightning, or notice darkening skies. Avoid open fields, tall isolated trees, water, and metal objects. If you cannot reach a building or car, crouch low with your feet together, keep your hands on your knees, and make yourself the smallest target while minimizing contact with the ground. Stay away from concrete walls and floors that may contain metal reinforcing bars, and avoid plumbing, windows, and doors until the storm passes. For broader financial context on risk exposure, see the Forbes business risk overview.
What Not to Do During a Lightning Strike
Do not lie flat on the ground, touch electrical equipment, corded phones, or plumbing fixtures, or stand near tall isolated structures such as poles and towers. Avoid open vehicles like golf carts, convertibles, and bicycles, and do not shelter under isolated trees or picnic shelters. If you are in a group, spread out at least 20 feet apart to reduce multiple casualties. Wait at least 30 minutes after the last sound of thunder before resuming outdoor activities, as lightning can strike from the back side of the storm cell. These precautions align with guidance from the National Weather Service and NOAA, which track lightning fatalities and injuries annually.
Understanding Lightning Risk and Safety Data
The National Weather Service reports that lightning kills an average of 20 people per year in the United States and injures hundreds more, with the highest risk periods during summer afternoons and evenings. NOAA's Storm Prediction Center and lightning detection networks, including those operated by Vaisala and Earth Networks, track cloud-to-ground strikes and issue alerts used by utilities, outdoor event planners, and emergency managers. Insurance data from the Insurance Information Institute shows that lightning is a leading cause of property claims, affecting homes, businesses, and vehicles, and underwriters increasingly use lightning maps and risk scores to set premiums. For financial protection details, see the Insurance Information Institute lightning statistics page.
How Lightning Detection and Warning Systems Work
Modern lightning detection systems use a network of ground-based sensors and satellite-based optical and radio-frequency sensors to map strikes in near real time. Companies such as Vaisala and Earth Networks provide data feeds to airlines, utilities, and outdoor event operators, enabling them to pause operations and clear exposed areas when lightning is detected within a defined radius. The National Lightning Safety Council and local emergency management agencies use these data to issue warnings and to calibrate public safety campaigns, including the "When Thunder Roars, Go Indoors" message promoted by the National Weather Service. These systems also feed into risk models used by insurers and businesses to quantify exposure and to set operational protocols for lightning-prone regions.
Protecting People, Property, and Operations From Lightning
Installing a properly designed lightning protection system, including air terminals, conductors, and grounding electrodes, can significantly reduce the risk of fire, structural damage, and electrical surges in buildings and industrial sites. The National Fire Protection Association's NFPA 780 standard outlines requirements for lightning protection installation, and certified installers follow these guidelines to ensure compliance with local building codes and insurance underwriting criteria. For businesses, integrating lightning alerts into operational continuity plans, alongside surge protection for critical equipment, helps minimize downtime and financial losses during storm events. For an example of a company involved in advanced sensing and data infrastructure, see the