A weather-related cancellation or delay is closure, cancellation, or delay of an institution, operation, or event as a result of inclement weather. Certain institutions, such as schools, are likely to close when bad weather, such as snow, flooding, tropical cyclones, or extreme heat or cold impairs travel, causes power outages, or otherwise impedes public safety or makes opening the facility impossible or more difficult. Depending upon the local climate, the chances of a school or school system closing may vary. While some regions may close or delay schools when there is any question of safety, others located in areas where bad weather is a regular occurrence may remain open, as local people may be accustomed to travelling under such conditions.

Many countries and sub-national jurisdictions have mandates for a minimum number of school days in a year. To meet these requirements, many schools that face a likelihood of closure build a few extra school days into their calendar. If, by the end of the year, these days are unused, some schools give students days off. If all snow days are exhausted, and inclement weather requires more closures, schools make the days up later in the year. State education departments have, by administrative decision late in the 2015 Texas school year, not required make up days for weather-related cancellations.


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