Even as Mayor Rahm Emanuel warns about a property tax hike of up to $250 million for the cash-strapped Chicago Public Schools, another big wave of increases likely is coming to rescue the pensions of police officers and firefighters. A massive payment due to those retirement plans next year could drive up Chicago property taxes by more than 30 percent, according to a Crain's analysis. And if the current logjam in Springfield continues, it could be a lot worse. Taxes on a $250,000 home would jump $224, assuming the city continues its current practice of using property taxes to fund...