https://www.watermedia.org/how-much-water-does-it-take-to-drown
How Much Water Does It Take to Drown?
The amount of water it takes to drown varies based on factors such as age, physical condition, and swimming ability. A person can drown in as little as one inch of water, especially infants and small children, who are more vulnerable to drowning. In general, drowning can occur in as little as one to two cups of water, but it can also occur in larger amounts. For example, a person can drown in a bathtub filled with water, which is typically around 60 liters.
Can You Drown in Shallow Water?
Yes, you can drown even in shallow water, especially if you hit your head when diving or jumping into a pool. Shallow water can also be deceptive, and a person may not realize how shallow it is until it’s too late. Additionally, currents and waves can cause a person to lose their balance and fall in shallow water, leading to drowning.
Can You Drown in a Bathtub?
Yes, you can drown in a bathtub. Infants and small children are at the highest risk of drowning in a bathtub, especially when left unattended. However, adults can also drown in a bathtub if they become unconscious or have a medical emergency.
How Long Does It Take for Drowning to Occur?
Drowning can happen within seconds or minutes. In general, it takes only a few seconds for a person to inhale enough water to impair their lung function. Afterward, it takes only a few minutes for the lack of oxygen to damage the brain or cause cardiac arrest.
How Can You Tell If Someone is Drowning?
Contrary to popular belief, drowning doesn’t always involve thrashing around and yelling for help. In most cases, drowning is a silent event, and the victim may not be able to shout or wave their arms. A drowning person may appear calm and quiet or struggle frantically without making any noise. If you suspect someone is drowning, look for signs like their head bobbing up and down, their mouth open, and their eyes closed.
If your three year old wearing a lifejacket falls flat on his face, he will find it harder to get up, because of said lifejacket. Said lifejacket may be more of a danger than a safety aid in this situation. Especially since you seem to be under the misguided belief that the lifejacket will save his life. There isn't necessarily enough space for him to float and flip which an infant's lifejacket are usually designed to do if the water is this shallow.
You are not as smart and as safe as you are trying to make out here.