There are warnings for people to avoid swimming in lakes, rivers and other open water.
It follows the death of 17-year-old Russell O'Neill who lost his life over the weekend, swimming in a quarry near the Malvern Hills in Worcestershire.
Charlotte Grant reports.
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Another dry and bright day on Friday with some decent sunny spells. The strengthening southeasterly wind will make it feel rather cold.
Most parts should see a dry day with some bright or sunny spells, although the odd light shower can't be ruled out.
Hundreds of people turned out to open a cancer support centre in memory of fundraiser Harry Moseley. It would have been his 18th birthday.