Cold snap moving in — heating fires and CO calls climb from here

Mid-November is the hinge. Overnight lows crossing into hard-freeze territory are when households that ran fine all autumn switch on heat sources that have sat idle since spring. Furnaces fire for the first time, space heaters come out of closets, and people who lost power or never restored it fall back on stoves, ovens and generators for warmth. Every one of those is a familiar line on your run sheet, and they cluster in the same cold stretch.

What that means for the shift: expect more working fires in occupied dwellings during the early-morning hours, often rooms-and-contents jobs started by heaters placed too close to combustibles. Expect carbon monoxide calls to rise in step — some as alarm activations, some as vague illness that reads like flu until a monitor says otherwise. A multiple-patient CO scene can present as a welfare check. Carry the meter in, not just to the door.

For EMS and rescue, cold ground is the other half of this. Ice on untreated walkways and steps drives falls, wrist and hip fractures, and head strikes, concentrated around dawn and dusk. Exposure cases follow the same curve, worst for people who are unsheltered, older, or alone and down for hours before discovery.

For dispatch, the pattern is volume and overlap — heating fires and CO calls landing in the same windows, often in the same housing stock. Flag CO history on repeat addresses where you can.

For emergency managers, this is the period to confirm warming-center capacity and the trigger points for opening them, and to check that cold-weather messaging is already out, not drafted for later.

None of this is one storm. It is the season turning, and the work turning with it. Treat the first cold week as the one that sets the pattern for the months behind it, and brief crews before the calls, not during them.