Doctors aren't sure why younger people are at increased risk, but a combination of diets high in ultraprocessed foods, overuse of antibiotics and hotter summers may be to blame.
Experts aren’t sure why more children and teens are developing the condition, but they speculate that a combination of factors are to blame, including diets high in ultraprocessed foods, increased use of antibiotics early in life and climate change causing more cases of dehydration.
Most likely reasons according to the article
The summary at the end basically says “drink more water”, too.
Your, the reader, should take this as your cue to drink water.