Indiana Mom of Two Dies After Drinking Too Much Water During Family Trip: 'Four Bottles in 20 Minutes'

Miller also revealed that his 35-year-old sister’s brain started to swell as a result of the large amount of water she consumed at Lake Freeman.

“My sister, Holly, called me, and she was just an absolute wreck,” Miller explained. “She was like: ‘Ashley is in the hospital. She has brain swelling, they don’t know what’s causing it, they don’t know what they can do to get it to go down, and it’s not looking good.’”

“It was a shock to all of us,” he continued. “When they first started talking about water toxicity. It was like this is a thing?”

Water toxicity, which can also be referred to as water poisoning or water intoxication, reportedly occurs when too much water is consumed in too short a period of time.

The rare condition can also occur if a victim’s kidneys retain too much water due to other underlying health conditions.

The majority of victims who suffer from water toxicity reportedly suffer from symptoms such as muscle cramps, soreness, nausea, and headaches.

Dr. Blake Froberg, a toxicologist with IU Health Arnett Hospital, explained that the rare cause of death most often occurs during the summer, if someone works outside, or exercises frequently.

Dr. Froberg also explained that some individuals are “more at risk” to suffer from water toxicity.

“There are certain things that can make someone more at risk for it, but the overall thing that happens is that you have too much water and not enough sodium in your body,” the toxicologist explained.

He added that it is “important for people to drink things that have electrolytes, sodium, and potassium.”