**US thunderstorm protocols, driven by NOAA lightning rules, are the dominant factor shaping expectations for weather-related suspensions at the 2026 World Cup.** Matches at American venues must halt immediately if lightning is detected within an eight-mile radius of the stadium; the 30-minute resumption clock resets with any new strike, often resulting in multi-hour delays. FIFA follows these local safety standards without override authority and lacks a fixed time limit before assessing potential abandonment on a case-by-case basis, with abandoned games resuming later from the paused minute. Summer thunderstorms are common across numerous host cities, raising the likelihood of interruptions at open-air stadiums. Recent reporting has highlighted this dynamic in the days leading into the tournament, underscoring how strict enforcement and reset mechanics differ from prior World Cups. Heat-related cooling breaks are also mandated but operate separately from suspension protocols. Traders monitor forecasts for high-risk venues, noting that even brief storms can trigger repeated halts while prolonged activity increases abandonment odds.