Sunbathers near St Paul's
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UK heatwave: Met Office issues health weather warning

17 July 2013 Last updated at 22:36 BST

Health officials are warning people to take care in the heatwave after 4 people died in separate incidents.

Wednesday was officially the hottest day of the year with temperatures above 30 celsius in London and much of south-east England.

The Met Office has upgraded its health warnings and says it expects the high temperatures to continue over the next few days.

Sarah Campbell reports.