The coastguard has said it is "highly unlikely" a man, who was swept into the sea in gale-force winds has survived.
Stuart Atkinson, watch manager at Crosby Coastguard station, said the strong, westerly gale-force winds made the search operation difficult.
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The huge counter-terrorism effort is placing an unsustainable strain on wider policing service, one of the most senior officers has warned.
A man and woman have been arrested on suspicion of murder after a badly burned body was found in a garden in Southfields, south-west London.
Kim Jong-un has called Donald Trump "deranged" and says he will "pay dearly" for his threats, according to North Korea's state news agency.