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.