Tropical cyclone preparedness

Tropical cyclone preparedness is the advance planning and action used to reduce deaths, injuries, property damage, and disruption from tropical cyclones.

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Tropical cyclone warning: A public alert that a tropical cyclone may affect a specified area within a stated time. Warnings provide the time-sensitive trigger for protective actions before hazardous conditions arrive.
Tropical cyclone forecast: An estimate of a tropical cyclone’s future track, intensity, or associated hazards. Forecasts inform when to issue warnings, stage resources, and begin protective measures.
Tropical cyclone: A rotating low-pressure storm that forms over tropical or subtropical waters and has organized thunderstorms. The storm’s structure and hazards determine which protective measures are needed.
Hurricane Katrina: A powerful Atlantic hurricane that struck the Gulf Coast of the United States in August 2005. Its catastrophic flooding exposed weaknesses in evacuation, levee protection, and emergency coordination.
Evacuation behavior: The decisions and actions people take when deciding whether, when, and how to evacuate from a hazard. Warning response depends on trust, risk perception, past experience, transport, and available shelter.
Hurricane evacuation: The organized movement of people away from areas threatened by a hurricane. Evacuation plans turn forecasts and official orders into safer movement from exposed areas.
Storm surge: An abnormal rise of seawater driven primarily by a storm’s winds and low pressure. Surge risk shapes evacuation zones and coastal protection plans, often more than wind forecasts alone.
Tropical cyclone wind scale: A classification system that groups tropical cyclones by their sustained wind speeds. Wind categories help communicate intensity, though they do not describe every local hazard.
Cyclone Nargis: A severe tropical cyclone that struck Myanmar in May 2008, causing catastrophic storm-surge flooding. The disaster illustrates how limited warning access and exposure can magnify cyclone losses.
Risk communication: The exchange of information about hazards and risks among institutions, experts, and affected communities. Clear communication must convey uncertainty and urgency without undermining trust or prompting unsafe choices.