[freetime2]

Yup, drowning is a leading cause of death for children in the US [1]:

> More children ages 1–4 die from drowning than any other cause of death except birth defects. For children ages 1–14, drowning is the second leading cause of unintentional injury death after motor vehicle crashes.

Definitely worth taking seriously - and not being able to swim is a risk factor. My kids have been taking lessons since they were in preschool, but even then I don't let them out of sight when we're in the water because they still aren't very strong swimmers.

[1] https://www.cdc.gov/drowning/facts/index.html