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Tsunamis
A tsunami is a series of long ocean waves usually caused by undersea earthquakes, volcanic activity or landslides. The first wave may not be the largest.
Important: Use this guide for education only. Always follow local emergency services and official alerts.
How risk grows
Risk becomes higher when a hazard affects vulnerable buildings, crowded places, weak infrastructure or communities without warning systems and response plans.
Preparedness checklist
- If you feel strong coastal shaking, move inland and uphill immediately.
- Do not wait at the shore to watch waves.
- Return only when authorities say it is safe.
Community response
Good response depends on clear communication, accessible shelters, trained volunteers, reliable power, safe water and rapid support for children, older people and people with disabilities.
海啸
海啸通常由海底地震、火山活动或滑坡引发，是一系列长波。第一波不一定最大。
重要： 本指南仅用于教育。请始终遵循当地应急部门和官方预警。
风险如何上升
当灾害影响脆弱建筑、拥挤区域、薄弱基础设施，或缺少预警和应急计划的社区时，风险会明显增加。
准备清单
- 若在海岸感到强烈震动，应立即向内陆和高处转移。
- 不要留在岸边观看海浪。
- 只有在官方确认安全后再返回。
社区响应
有效响应依赖清晰沟通、可达避难所、训练有素的志愿者、可靠电力、安全用水，以及对儿童、老人和残障人士的快速支持。