(Also known as “Daluyong ng Bagyo”) is the abnormal rise in sea level that occurs during tropical cyclones or “bagyo”. It is caused by strong winds and low atmospheric pressures produced by tropical cyclones.

A storm surge warning is defined as the danger of life-threatening inundation from rising water moving inland from the shoreline somewhere within the specified area, generally within 36 hours, in association with a tropical, subtropical, or post-tropical cyclone.

Storm tide is the water level rise due to the combination of storm surge and the astronomical tide. This rise in water level can cause extreme flooding in coastal areas, particularly when storm surge coincides with normal high tide, resulting in storm tides reaching up to 20 feet or more in some cases.

Storm surge is the abnormal rise in seawater level during a storm, measured as the height of the water above the normal predicted astronomical tide. The surge is caused primarily by a storm’s winds pushing water onshore.

Storm surge—the abnormal rise of water generated by a storm, over and above the predicted astronomical tides—can lead to saltwater flooding of locations far inland from the coast.