by Paula Huber
Kayaking on the Great Lakes, or during cold weather here in Ontario, requires thoughts about cold water immersion in the event of a capsize.
Hopefully most of us know and understand the definition of hypothermia and how it occurs. “Hypo” refers to below normal and “thermia” refers to state of heat; therefore hypothermia occurs when body temperature is below 35°C.
When immersed in water our bodies lose heat 25 times faster than in air. Heat loss is increased with movement in the water. Once out of the water our bodies have an after drop which means that our core body temperature continues to decrease, sometimes for several hours.
Upon initial capsize or immersion into cold water we perform a sudden deep gasp followed by up to one minute of hyperventilation. If the airway is submerged during capsize, water may be taken into the body and drowning will likely follow. It is important initially to keep the airway out of the water and concentrate to control one’s breathing.
Re-entry into the kayak is very important within the first few minutes after a capsize. Body incapacitation will progress within the first 10 minutes of immersion. There will be loss of effective movements in fingers, arms and legs which will hinder the successful re-entry into the kayak.
Continued immersion will result in a further decrease in body temperature which will affect problem solving ability, muscle co-ordination, dexterity and mental judgement necessary to get back into the kayak. Eventually unconsciousness and then death will occur.
How can we decrease the possibility of hypothermia due to cold water immersion?
- Acknowledge that there is always the possibility of a capsize (even on a hot summer day paddling on calm water).
- Plan your paddle according to your true abilities (be an independent kayaker uninfluenced by group dynamics).
- Have a plan B (coffee break at Tim Horton’s if the little voice inside of you says conditions are not right for me). There’s always tomorrow to paddle.
- Learn and practise self-rescue and kayak re-entry from the water.
- Mentally think about a capsize and your actions to re-enter the kayak.
- Wear appropriate thermal protection for water temperature.
- Keep a panic pack in your kayak. For example, in a dry bag keep a change of clothes such as long sleeve warm top, fleece pants, wind pants, insulated top, wool toque or fuzzy rubber/neoprene beanie/hood, hand warmers, wool or neoprene gloves, food (granola bars, fruit leather, nuts etc.) and a drink.