The heating season is open — expect CO calls and the first ice

Furnaces, space heaters, generators and wood stoves are coming back on across the region this week. That is the trigger for the year's first run of carbon monoxide calls. Expect them clustered in the cold hours, often in older housing stock and in homes where a generator has been run in or near the structure. A multi-occupant residence with several patients reporting headache, nausea or dizziness and no obvious cause should move your index of suspicion before you reach the door. Meter on the way in, not after.

Overnight lows are now dropping to or below freezing in exposed and low-lying ground. The first hard frost means black ice on bridges, overpasses and shaded road sections that still read dry in headlights. These surfaces freeze before the roadway around them and refreeze after any daytime melt. Early-shift and late-shift crews will see single-vehicle loss-of-control and secondary collisions at the scenes of first ones. Position for the second crash, not just the first.

Heating fires rise with the first sustained cold snap. Chimney fires, overloaded circuits and heaters set too close to combustibles are the usual pattern after a long-off summer. Fuel load in the dwelling is unchanged from July; the ignition sources are new.

For dispatch and EM, the practical shift is call mix and timing. CO and heating-fire volume loads onto the cold overnight and early morning. Thin daytime staffing meets a demand curve that is moving earlier.

Exposure risk also returns for anyone operating outdoors for extended periods — long extrications, water work, prolonged scene command. Rehab that was optional in warm weather is not now.

None of this is a single forecast event. It is the season turning. Confirm current conditions against your local National Weather Service forecast office before the shift, and brief crews on the overnight low and any freeze or frost advisory in effect for your area.