A tsunami warning is issued by a government agency, usually a national weather service or emergency management agency, when there is a threat of a tsunami occurring. Warnings are based on information from seismic monitoring networks, sea-level gauges, and other sources. They are disseminated through various channels, including television, radio, social media, and mobile alerts. Warnings typically include information about the estimated time of arrival of the tsunami, the areas that are at risk, and instructions for residents to evacuate to higher ground or seek shelter in a sturdy building. Tsunami warnings are essential for saving lives and reducing the impact of these devastating events.
