Organisers of the Great North Swim are remaining hopeful that today's event can go ahead despite flooding in parts of Cumbria.
The Environment Agency has put a number of flood alerts in place for after heavy rainfall over the weekend. With Cockermouth, Keswick, and Carlisle all affected by the floods.
The first two days of the Great North Swim also fell victim to the weather, after strong winds were forecast on both Friday and Saturday. The two mile swim across Windermere, which was due to take place on Friday, was postponed by 48 hours as a result.
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The historic event always takes place on the last Friday in July.
Early enquiries suggest the men may have taken the drug Blue Valium. Two of them remain in hospital with breathing problems.
More than 8,000 people are expected to attend over the three day event, which starts at 7pm tonight.