MORE MORE 18 DEAD IN CHICAGO FROM HEAT... 18 DEAD IN CHICAGO FROM HEAT... 18 DEAD IN CHICAGO FROM HEAT... 18 DEAD IN CHICAGO FROM HEAT... 18 DEAD IN CHICAGO FROM HEAT... CBS News 18 DEAD IN CHICAGO FROM HEAT... 18 DEAD IN CHICAGO FROM HEAT... already surpassed the total number 18 DEAD IN CHICAGO FROM HEAT...