Cardiac arrest reported near Olson Road in Union Heard on: Mchenry County IL Fire Dispatch 00:34 00:00 Union, cardiac arrest, Transcript This transcript is auto-generated from live dispatch audio and may be incomplete or inaccurate. It is not an official report and may change. 00:00 Union, cardiac arrest, 00:02 (number withheld) Olson Road, 1141, 1153, Battalion 11, two, time 249. 00:14 Master Chief. 00:16 Okay, 1141's en route. 00:20 Master Chief. 00:22 Mark your units en route to Olson Road. 00:24 Just for information, our caller is not doing CPR at this time. 00:30 Message received. 00:33 1153 on scene. 2026-10-31 07:50 UTC Medical Emergency Olson Rd, Union, IL 60180 View on map