International research indicates people with Autism Spectrum Disorder (ASD) are at greater risk of premature death due to drowning compared with the general population. Pre-existing medical conditions are one factor that can increase drowning risk.

While seizure disorders such as epilepsy have been specifically identified, recent studies have focused on ASD and the increased risk of child injury. Intellectual disabilities, epilepsy, mental health and chronic physical health conditions are also associated with increased risk of death among those with ASD.

In Australia, between 2002/03 and 2017/18 (16-year period), 33 people drowned where ASD was known to be a factor, accounting for 0.7% of the total drowning deaths during this time. Children aged 0 to 9 years accounted for 70% of ASD-related drowning deaths. Inland waterways (river/creek/stream and lake/dam/lagoon) were the most common location for drowning in these cases.

People with ASD are often drawn to water. In particular, people with ASD have a greater tendency to wander - that is, they may leave a safe area in search of a retreat away from overstimulation (eg, crowds, noise or other stimuli) and may naturally gravitate towards water as a means of alleviating their sensory needs but without understanding the risks it may present. Supervision around water, including when bathing, is therefore paramount.

With the right support and learning environment, people with ASD can learn to swim. Strategies include small group or one-on-one lessons with a specialised instructor. It is worth noting that, although people with ASD may have had swimming lessons, they may experience difficulties translating these skills across different environments. Close supervision, and water safety education, including exposure to different aquatic environments, is essential in preventing drowning among people with ASD.

Royal Life Saving's fact sheet on Autism Spectrum Disorder and Drowning has been written with the help of Autism Swim.