Why can natural disasters be cascading hazards?

• A. Tectonic and climatic processes can trigger cascading hazards and exacerbate impacts
• B. They occur in isolation
• C. They cannot influence future events
• D. They always reduce risk

Answer: (A)

Cascading hazards happen because natural systems are interconnected, so one event can create the conditions for others to occur or worsen. When a single disaster occurs, it can trigger secondary hazards that amplify damage and spread impacts through environment, infrastructure, and communities. For example, an earthquake can rupture gas lines and start fires, or shaking can destabilize slopes and trigger landslides that block rivers or cause floods. Likewise, heavy rainfall or storms can overwhelm drainage, cause mudslides, and disrupt critical services, making it easier for additional hazards to arise. Because tectonic and climatic processes can set off these interconnected sequences, the overall risk grows beyond a single event. Hazards do influence future events and don’t always reduce risk.