CA and OR pretty much on fire, smoke filled skies and extreme temperatures (triple digits in places.) But of course, global warming is just "fake news"!
Take your pick:
http://www.independent.co.uk/life-style/health-and-families/health-news/the-life-saving-cause-of-sighing-uncovered-by-scientists-a6863436.html
http://www.mdedge.com/jfponline/article/63005/pulmonology/sigh-syndrome-it-sign-trouble
The first link mentions the brain...