The Chinese city of Shenzhen began preparing to evacuate 400,000 people while residents of the northern Philippines sought shelter from gale-force winds Monday as Super Typhoon Ragasa continued on a collision course with southern China.

The typhoon made landfall on the Philippines' Calayan Island, part of the sparsely populated Babuyan chain, at 3 pm (0700 GMT), according to the Philippine weather service.

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