Extreme weather: Polar vortex in Midwest, record heat in Australia, weird warmth in Alaska. What's going on? - USA TODAY

Extreme weather: Polar vortex in Midwest, record heat in Australia, weird warmth in Alaska. What's going on?  USA TODAY

Extreme weather has wreaked havoc worldwide this month: As the upper Midwest shivered with record-breaking cold temperatures thanks to the polar vortex, ...