Reason for a school closing

STORM

This natural event might bring heavy rain, wind, or snow, often leading to canceled classes for safety. Think of a weather-related disruption.

A "school closing" often happens due to bad weather, and "storm" is a common reason—think snowstorms, hurricanes, or severe thunderstorms that make travel unsafe. The clue plays it straight with no wordplay, just a direct link between extreme weather and school cancellations. It’s a simple definition where the answer fits naturally as the cause. Most people have experienced this, so the connection is easy to spot.