Climate change threatens the mental well-being of youths. Here’s how to help them cope.

We’ve all read the stories and seen the images: The life-threatening heat waves. The wildfires of unprecedented ferocity. The record-breaking storms washing away entire neighborhoods. The melting glaciers, the rising sea levels, the coastal flooding.

As California wildfires stretch into the colder months and hurricane survivors sort through the ruins left by floodwaters, let’s talk about an underreported victim of climate change: the emotional well-being of young people.

A...