https://www.sciencedaily.com/releases/2018/07/180723142837.htm

"When talking about climate change, it's often easy to think in abstractions. But the thousands of additional suicides that are likely to occur as a result of unmitigated climate change are not just a number, they represent tragic losses for families across the country," said Burke, assistant professor of Earth system science in the School of Earth, Energy & Environmental Sciences at Stanford.

Researchers have recognized for centuries that suicides tend to peak during warmer months. But, many factors beyond temperature also vary seasonally -- such as unemployment rates or the amount of daylight -- and up to this point it has been difficult to disentangle the role of temperature from other risk factors.