Drowning is defined as death by suffocation as a result of immersion in water. The victim has inhaled water, which interferes with breathing and leads the circulatory system to collapse in wet drowning. The airway shuts owing to spasms produced by the presence of water in the less common case of dry drowning. Generally, wet drowning affects children younger than 13 years old and adults older than 65. It can also occur in people who are not swimming proficiently. Wet drowning happens when a person goes underwater and cannot get out again. The person might not be able to call for help or might not be able to breathe if they do. In this case, drowning becomes wet because the victim's body fluids will enter the water if they fail to resurface. The three main factors that determine whether a person will die in a drowning incident are the depth of the water, the duration of the incident, and the age of the victim. If you are unable to revive a person after they have been in water for an extended period, then they have likely died of a heart attack caused by stress. If you are able to revive them, then they are still alive and may need CPR. Dry drowning occurs when a person breathes in water while they are asleep or unconscious. This can happen if someone falls into a pool while sleeping and does not know how to swim or use the necessary precautions.