article_snippet.sent: The tragedy came on the hottest day of the year so far as temperatures reached 25.1C at St James's Park in the capital and in Frittenden, Kent.
article_snippet.sent: The heath was full of sunbathers as the incident unfolded yesterday, as dozens of people had gathered to enjoy the unseasonably warm weather.
article_snippet.sent: Hampstead Heath has three swimming ponds which can become extremely busy in good weather.
article_snippet.sent: Despite temperatures reaching 25C in London yesterday, waters remained cool on Hampstead Heath, with temperatures recorded at about 8C. Hampstead Ponds in Hampstead Heath, north London (pictured), is a popular spot for residents and tourists .