Andrew 'Bart' Simpson, 36, won gold at the 2008 Beijing Olympics and silver in last year's Games in London, both in the Star class.
Born in Chertsey, Surrey, he started sailing at the age of six with his father in Christchurch, Dorset, according to Tyler Sports Management.
Nicknamed Bart, he was awarded an MBE in the 2009 New Year Honours list.
A Foreign Office spokesman said it was aware of reports of the death of a British citizen and had contacted its counterparts in the United States.
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It looks like another very warm day, with a maximum temperature close to 27 Celsius (81F).
The Prince of Wales is expected to be named a future head of the 53-nation body after receiving a public endorsement from the Queen.
Heavy artillery and airstrikes have been used to pummel Yarmouk, ITV News correspondent Dan Rivers reports.