China's State Oceanic Administration (SOA) issued the red alert for ocean waves and storm tides as Typhoon Nida approaches the mainland.
From tonight to tomorrow, sea waves as high as 11 metres are expected in the northern South China Sea, while the southern Taiwan Strait will witness waves as high as seven meters.
The SOA also issued a red alert storm tides and estimated that the sea level off the Pearl River estuary will rise up to 220 cm.
Typhoon Nida is expected to land in Guangdong Province early tomorrow, probably around the Pearl River Delta, state-run Xinhua news agency reported.
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The China National Commission for Disaster Reduction has asked people in typhoon-affected areas to stock daily necessities for at least one to three days, the circular said, adding that emergency mechanisms for disaster relief will be activated if necessary.
Typhoon Nida will make landfall in south China's Guangdong Province tomorrow.
Several Chinese provinces suffered heavy damages due to heavy rains during the past few weeks.