The Environment Agency says water levels of 5.8 metres are the highest ever recorded in Hull, as storm conditions have created a tidal swell.
Eight Severe Flood Warnings and 34 Flood Warnings have been issued by the Agency across the region.
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Angela Ball, 81, has grey curly hair and is believed to be wearing a 3/4 length beige coat.
The 28-year-old's activities were first logged by Canadian authorities after he shared images via social media.