quickly and silently close to other swimmers or safety. In most persons, the laryngospasm relaxes some time after unconsciousness and water can then enter the lungs causing a "wet drowning". "The Truth About Cold Water". Physiological mechanisms involved in the risk of loss of consciousness during breath-hold diving (PDF). The primary urge to breathe is triggered by rising carbon dioxide (CO2) levels in the bloodstream. 12 Dry drowning:Drowning in which no water enters the lungs 10 44 Near drowning: Drowning which is not fatal 10 44 Wet drowning: Drowning in which water enters the lungs 10 44 Passive drowning: People who. 3 7, initially the person holds their breath, which is followed by laryngospasm, and then low oxygen levels. 65 66 Following the 2002 World Congress on Drowning in Amsterdam, a consensus definition of drowning was established. "Death After Swimming Is Extremely Rare and is NOT Dry Drowning".