Douglas Todd: Fighting ever-hotter summers may require a global government

The west coast of North America had its most devastating forest-fire season in recorded history this summer, with intense heat and drifting smoke stoking distress. Wildfires also roared through Sweden and Greece, killing scores of people.
The Middle East is forecast to increasingly broil under virtually unlivable extreme temperatures — with a city in Iran last year almost reaching 54 C., the highest-ever reliably recorded temperature. Water shortages, crop failure and extreme drought are t