Why Does Even a Slight Lightning Flash Stop a Football World Cup Match?

(Digital Itla) – During World Cup matches being held in the United States, if a risk of lightning strikes emerges near a stadium, play is halted immediately. Local safety regulations are followed for this purpose to protect players, officials, staff, and spectators from any potential danger.

According to the British news agency Reuters, regulations mandate that if a lightning strike is detected within an eight-mile radius (approximately 13 kilometers) of the stadium, the match is suspended at once. Play cannot resume until 30 consecutive minutes pass without any further lightning. If lightning strikes again during this period, the 30-minute countdown resets completely.

Experts point out that lightning does not always strike exactly where rain or a storm is present; it can strike miles away. Therefore, if thunder is heard, it indicates that a lightning hazard exists. The National Oceanic and Atmospheric Administration (NOAA) in the US states that no place outdoors is completely safe during a thunderstorm, so people should move inside a sturdy building.

According to Chris Vagasky, a meteorologist associated with the National Lightning Safety Council, most people think lightning only causes harm if it strikes a person directly, but in reality, that is rarely the case. According to him, lightning's effects can be dangerous to people through other mechanisms as well.

Within a stadium, the nature of the risk depends on its architecture. In stadiums with a fully closed roof, people enjoy relatively higher protection because the building's structural frame safely conducts the electrical charge to the ground. Conversely, in stadiums where the roof covers only the spectator seating or those that are entirely open-air, players, fans, and others face a higher risk.

Historical data shows that lightning strike rates are not uniform across all cities. Past records reveal that during the World Cup season, areas like Miami and Kansas City have observed higher lightning activity compared to San Francisco and Seattle—and these locations do not feature stadiums with fully closed roofs either.

When a lightning alert is issued, fans are moved to safe zones within the stadium, such as enclosed concourses or interior spaces equipped with walls, roofing, and plumbing/electrical grounding systems. Experts explain that if lightning strikes, the building's infrastructure channels the surge through its wiring and pipes into the ground instead of passing it to the people.

Experts also warn that while many stadiums are equipped with sophisticated lightning protection systems, lightning does not always hit predicted spots, which is why sitting in open stands during thunderstorms is not considered safe.

Data also indicates that lightning activity in World Cup host cities peaks during afternoon and early evening hours—coincidentally when most matches are played—further elevating the importance of precautionary measures.

This risk is not confined to the stadiums alone. During the World Cup, thousands of people gather at Fan Festivals, public screening venues, transport hubs, and other public squares, where being in an open environment leaves people vulnerable to lightning. Experts say a simple rule should always be remembered: "When thunder roars, go indoors." If you can hear thunder, lightning can be a threat to you, and you should move inside a safe building immediately.