As the heatwave persists, many individuals are flocking to beaches, lakes, and rivers to seek relief from the soaring temperatures. Despite the scorching weather on land, the water remains cold and poses a significant drowning risk. The Extreme Environments Lab at the University of Portsmouth sheds light on the dangers of cold water shock.
During a visit to the lab, an experiment was conducted where the participant, equipped with a heart monitor and breathing tube, spent 10 minutes in a specialized plunge pool set at 15°C, reflecting the typical sea temperature in the UK. The surrounding room was heated to 28°C to simulate the current heatwave conditions.
Upon immersion, the individual experienced a drastic increase in gasp rate, surging from a normal 0.3 liters to 1.5 liters, a level that could lead to drowning if submerged underwater. Additionally, the heart rate spiked from a resting 80 beats per minute to 110, potentially causing blood vessel constriction and triggering cardiac issues, even in young individuals. Cold water shock, inducing gasping or heart failure, contributes to around 60% of drowning incidents.
The exposure to cold water also affected motor skills, with the participant’s typing speed significantly decreasing after spending time in the water. Infrared cameras revealed a notable shift in body heat before and after immersion, demonstrating the body’s response to cold water.
Further testing involved navigating a flume feature that generated a strong water current. Despite being a proficient swimmer, the individual struggled against the cold water’s force, highlighting the exhausting nature of such conditions.
Professor Mike Tipton, a renowned expert from the University of Portsmouth specializing in extreme environments, emphasized the rapid skin temperature drop upon entering cold water, triggering the cold shock response. He warned of the dangers associated with cold water immersion, underscoring the importance of staying vigilant and practicing safety measures while swimming.
The recent surge in drowning incidents, particularly involving young individuals, underscores the necessity for enhanced water safety measures. The ongoing heatwave in the UK has prompted health alerts, urging caution and preparedness during the hot weather spell.
In light of these risks, the RNLI advocates for the “Float to Live” technique to combat water emergencies, emphasizing the importance of remaining calm and controlling breathing in distressing situations. Additionally, the National Water Safety Forum recommends the ‘Phone, Float, Throw’ method for aiding individuals in trouble, stressing the need for prompt action and assistance.
The Mirror’s “Save Lives For Sam” campaign aims to address the rising drowning crisis in the UK through various initiatives, including advocating for water safety education in schools, public awareness campaigns, improved safety equipment, legislative measures like “Sam’s Law,” and dedicated leadership in water safety governance. Join the campaign to support these critical efforts and promote safer water practices.
