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Cold Water Shock: Deadly Danger Lurking in B.C. Waters
5 Jul
Summary
- Cold water shock occurs from sudden immersion in water below 15°C.
- It causes a gasp reflex, hyperventilation, and potential drowning.
- Wearing a life-jacket and controlling breathing are crucial safety measures.
A recent warning from Kamloops resident Teresa Seibel highlights the perilous risks of cold water shock, a phenomenon she prepared for during her English Channel swim. Experts explain that sudden immersion in water below 15°C triggers a dangerous physiological response.
This response includes an involuntary gasp reflex, which can lead to drowning if the head is submerged. Following the gasp, hyperventilation occurs, rapidly increasing heart rate and blood pressure. This is compounded by cold incapacitation, causing a rapid loss of strength and coordination.
Paramedic Brian Twaites notes that cold water shock is a significant factor in drownings, with at least 20 such incidents reported in B.C. waters this year, excluding a recent boat capsize. He stresses that controlling breathing and remaining calm are paramount. Wearing a life-jacket and keeping one's head above water are critical. Twaites advises against immediate swimming, instead prioritizing breath control and conserving energy until calm is restored.
