Shanghai has successively issued blue warnings for high tide levels of the Huangpu River, orange warnings for storm surges, and orange warnings for ocean waves. According to the “Shanghai Release” WeChat account, the Shanghai Hydrological Station issued a blue warning signal for the high tide level of the Huangpu River at 14:30 on August 27, 2026: Affected by typhoon No. 18 “Shader” and the astronomical tide, the highest tide level at the mouth of Huangpu Jiangsu is expected to reach about 4.85 meters at 0:40 tomorrow. The municipal flood control headquarters requires flood control agencies at all levels and all units along the river to inspect and implement preventive measures. At 14:00 on the same day, the Shanghai Ocean Monitoring and Forecasting Center issued an orange warning signal for storm surges: Affected by Typhoon No. 18 of this year, “Shader,” a storm surge of up to 60-100 cm is expected from this afternoon to tomorrow afternoon. It is an astronomical high tide warning level. The storm surge warning level for the Changjiang Koubao Town, Wusongkou, and Gaoqiao section is blue; the storm surge warning level for the Luchao Port section on the north coast of Hangzhou Bay is orange, and the storm surge warning level for the Jinshan estuary section is yellow. All relevant units are requested to take precautions in advance. The Shanghai Ocean Monitoring and Forecasting Center also issued an orange warning signal for ocean waves: due to typhoon “Shader” No. 18 of this year, it is expected that from this afternoon to tomorrow morning, the waters within the mouth of the Yangtze River will reach the yellow warning level; 1.5-2.5 meters of medium to large waves in the northern part of Hangzhou Bay will reach the blue warning level; 2.0-3.5 meters of medium to large waves in the Yangshan Port area, reaching the yellow warning level; the waters off the mouth of the Yangtze River will reach the orange warning level; all relevant units are requested to do a good job of preventing waves.

Shanghai has successively issued blue warnings for high tide levels of the Huangpu River, orange warnings for storm surges, and orange warnings for ocean waves. According to the “Shanghai Release” WeChat account, the Shanghai Hydrological Station issued a blue warning signal for the high tide level of the Huangpu River at 14:30 on August 27, 2026: Affected by typhoon No. 18 “Shader” and the astronomical tide, the highest tide level at the mouth of Huangpu Jiangsu is expected to reach about 4.85 meters at 0:40 tomorrow. The municipal flood control headquarters requires flood control agencies at all levels and all units along the river to inspect and implement preventive measures. At 14:00 on the same day, the Shanghai Ocean Monitoring and Forecasting Center issued an orange warning signal for storm surges: Affected by Typhoon No. 18 of this year, “Shader,” a storm surge of up to 60-100 cm is expected from this afternoon to tomorrow afternoon. It is an astronomical high tide warning level. The storm surge warning level for the Changjiang Koubao Town, Wusongkou, and Gaoqiao section is blue; the storm surge warning level for the Luchao Port section on the north coast of Hangzhou Bay is orange, and the storm surge warning level for the Jinshan estuary section is yellow. All relevant units are requested to take precautions in advance. The Shanghai Ocean Monitoring and Forecasting Center also issued an orange warning signal for ocean waves: due to typhoon “Shader” No. 18 of this year, it is expected that from this afternoon to tomorrow morning, the waters within the mouth of the Yangtze River will reach the yellow warning level; 1.5-2.5 meters of medium to large waves in the northern part of Hangzhou Bay will reach the blue warning level; 2.0-3.5 meters of medium to large waves in the Yangshan Port area, reaching the yellow warning level; the sea area outside the Yangtze River estuary will reach the orange warning level; all relevant units are requested to do a good job of preventing waves.