ON the hottest day of the year so far, West Mercia Police is reminding residents of the dangers of swimming in open water in hot weather.

Residents are reminded that bodies of water can hide dangers such as hidden currents, hazardous objects, pollution and the risk of cold water shock.

Cold water shock affects a person's ability to swim and is a common problem in the UK.

Immersion in cold water leads to rapid cooling of the skin, gasping, hyperventilation and the restriction of blood flow. This can lead to panic as muscle length decreases, causing fatigue and reduced control over body movements.

According to the Royal Life Saving Society, 85 per cent of accidental drownings occur at open water sites.

Police are advising reisdents to keep away from the water's edge if walking near open water.

For those entering the water, residents are warned to avoid weirs, locks, pipes and sluices, and to never mix alcohol with swimming.

Police are also asking people to wear the recommended safety equipment and to get out of the water as soon as you start to feel cold.

Anyone who spots someone struggling in the water is urged to tell a nearby lifeguard, or call 999 and ask for the police at inland water sites and the coastguard at the beach.

They should then throw a buoyant to them and trye t reach them with a pole or item of clothing if safe to do so.