Level 4 Storm Surge Warning Issued for Northern Yamaguchi and Western Shimane

The Japan Meteorological Agency (JMA) has issued a Level 4 storm surge warning for parts of northern Yamaguchi Prefecture and western Shimane Prefecture. The alert is in effect due to the impact of Typhoon 9, which is currently moving near the Korean Peninsula. Authorities are urging strict vigilance against flooding in coastal areas and near river mouths as high tides are expected to persist until midday on July 15.

In the city of Nagato, Yamaguchi Prefecture, local authorities have issued evacuation orders to 1,744 households, comprising 3,246 people residing in coastal zones. The directive comes as the JMA reports that water levels will remain elevated through the morning hours, necessitating immediate action for residents in vulnerable areas.

The warning highlights the potential for significant inundation in low-lying coastal regions and river mouths. The JMA has advised the public to maintain a high level of caution as the meteorological conditions evolve. The specific areas under the Level 4 warning include parts of northern Yamaguchi and western Shimane, where the combination of storm surge and high tides poses a substantial risk to infrastructure and public safety.

This event is distinct from previous disaster alerts in the region. A separate tsunami advisory was issued on June 8, 2026, following a magnitude 8.2 earthquake, which affected the Pacific coast from Ibaraki to Okinawa Prefecture with expected wave heights of one metre. That advisory is unrelated to the current storm surge warning triggered by Typhoon 9.

The Japan Meteorological Agency continues to monitor the trajectory and intensity of Typhoon 9. While the current warning covers specific prefectures, the exact impact may change based on real-time meteorological data. Residents in the affected areas are advised to follow local authority instructions and remain vigilant against the risk of flooding.