* Natural Disasters: Earthquakes, hurricanes, tornadoes, floods, wildfires, blizzards, heat waves, droughts, landslides, tsunamis. Each of these has variations in severity.
* Technological Disasters: Power outages, gas leaks, fires (not necessarily natural causes), chemical spills or leaks, structural failures (building collapse), hazardous materials incidents.
* Human-Caused Disasters: Terrorist attacks, active shooter events, bomb threats, school bus accidents, fights/violence among students or staff, vandalism, cyberattacks (disrupting operations), food poisoning outbreaks.
* Health Emergencies: Outbreaks of infectious diseases (e.g., flu pandemic, COVID-19), medical emergencies requiring immediate attention (heart attack, stroke, allergic reactions), mental health crises.
Within each category, there's a spectrum of severity – from minor disruptions to catastrophic events. Therefore, rather than a numerical answer, it's more accurate to say the potential number of disasters affecting schools is extensive and diverse.