Two bodies have been pulled from the sea amid aggressive waves brought on by Storm Dennis.
Both fatalities occurred off the coast of Kent but they are not thought to be related.
One man died after falling from a fuel tanker near Margate Harbour, while a teenage boy lost his life after getting swept away in Herene bay.
Lifeboats and the coastguard helicopter had been scouring the Kent Coast for eight hours after reports a man had gone overboard at 5.40am.
The distress call is believed to have come from B Gas Margrethe, a 99-metre commercial vessel that had been anchored in Margate.
A coastguard spokesman said: ‘At around 1pm, after many hours of searching, a body was sadly found in the water by the RNLI Margate lifeboat and has been brought to shore.’
Emergency crews and a rescue helicopter were also deployed to Herne Bay, Kent, after 12pm, to reports a body had washed up on the shore.
Paramedics were unable to save the man, who was believed to be 19 years old.
He is believed to have gotten into trouble at sea after going thrill seeking in the waves.
Kent Police is understood to be leading the incident and are expected to release a statement shortly.
It comes as a torrential downpour and 80mph winds hit already flooded parts of the country.
The Met Office has issued eight weather warnings for Storm Dennis, which has already begun to wreck havoc in many parts of the UK.
More than 230 easyJet flights have been cancelled due to the weather, affecting 40,000 passengers
The British Army is being deployed to help ‘exhausted’ residents in the flood-hit Calder Valley ahead of Storm Dennis, a council boss said.
They are still recovering from the effects of Storm Ciara last weekend, which left hundreds of homes flooded and more than 500,000 without power.
The Met Office said that today’s winds will not be as strong as the 97mph during Storm Ciara.
But Dennis is bringing warm air and this added moisture ‘is one of the reasons why the rainfall is likely to be heavier.’
Met Office forecaster Alex Deakin said: ‘It’s not just one day but two into three days of potential problems from Storm Dennis.
‘Heavy rain is likely to be the biggest problem this weekend with flooding expected but it will still be very windy indeed and those winds could cause disruption
‘This storm will strike different parts of the UK at different times and in different ways so people need to make sure they are aware of the weather warnings.’
This is a breaking news story. More to follow