Coast Warning Issued Amidst Heatwave: Cold Water Shock Risks Highlighted
As an ‘Extreme Heat’ alert covers many parts of England and Wales this week, authorities are issuing a critical warning for individuals planning to visit coastal areas, particularly those intending to swim.
Safety Guidance for Coastal Visitors
The national meteorological service is urging beachgoers to exercise caution, emphasizing that sea surface temperatures remain significantly cooler than typical mid-summer levels. This poses a substantial risk of cold water shock, even during periods of intense heat.
Understanding Cold Water Shock
Samantha Hughes, National Water Safety Partner at the Royal National Lifeboat Institution (RNLI), stated, “With warmer weather approaching, it’s important to remember that the water is still cold. Entering it unexpectedly can lead to cold water shock, causing a sudden increase in breathing and heart rate, which may trigger panic.”
Hughes further advised on immediate actions if one finds themselves struggling in the water: “If you find yourself struggling in the water, remember to Float to Live: tilt your head back so your ears are submerged, relax and control your breathing. You may need to gently use your hands to help you stay afloat, and it’s ok if your legs sink—everyone floats differently.”
For those venturing into the sea, the recommendation is to always choose a lifeguarded beach and swim between the designated red and yellow flags. In any coastal emergency, dialling 999 and asking for the coastguard is the advised course of action.
Key Safety Measures for Water Activities
Experts highlight that water temperatures of 15°C (59°F) or lower can trigger cold water shock, significantly impacting breathing and movement. This risk is present for most of the year, with average UK and Ireland sea temperatures around 12°C (53.6°F). Inland waters, such as the River Thames, can be even colder, even during summer months.
The physiological effects of cold water shock include the constriction of blood vessels, leading to increased resistance in blood flow and a higher heart rate. This forces the heart to work harder, raising blood pressure, and can, in severe cases, lead to heart attacks, even in young and healthy individuals.
To mitigate these risks, several simple steps are recommended:
- Check Water Temperature: Be aware that sea and river temperatures can be low enough to cause cold water shock if at or below 15°C.
- Wear Appropriate Gear: A wetsuit is advised if planning to spend extended periods in the water.
- Use Safety Buoys: Wearing a life jacket or swimming buoy can increase your chances of staying safe if you experience cold water shock.
Further detailed information on cold water shock is available through the RNLI’s resources.
Heatwave Precautions
In addition to water safety, individuals visiting the coast should also be mindful of the risks associated with prolonged outdoor exposure during the current heatwave. Health advice recommends staying in the shade, particularly between 11 am and 3 pm. When outdoors, it is crucial to wear sunscreen, a hat, and light-coloured clothing.
Those planning coastal activities can access tide times, wave heights, and sea surface temperature data via the Met Office application.
