All across the Midwest, preparations have been under way for a bone-deep, relentless chill called a polar vortex. Extreme cold, which is expected to break all records, has already been blamed for one death in Minnesota. Officer Kraig Kalka is spending his time driving between homeless shelters, arranging transportation for those stuck on the streets, and collecting blankets and hand warmers to dole out downtown for some of Madison's most vulnerable residents. ‘What we're going to see, I don't remember ever seeing something like that before.’ The cold has caused statewide declarations of emergency, school closures, postal service interruptions, and 1,000 airline flight cancellations. Diesel fuel can turn to gel, clogging vehicles' fuel filters and leading to breakdowns. If a bus falters on a rural route, the wait for help can be lengthy.