First cold snap of the season lands this week — expect CO calls and ice on the first runs

The first hard cold of the season is the one that catches people out. Heating systems get switched on after months idle, roads ice before crews expect it, and the overnight low does the damage while most of the public is asleep. This outlook is about what that does to your shift, not about the weather itself.

Carbon monoxide is the predictable one. The first week furnaces, space heaters and generators run hard, filters are clogged and flues are blocked from summer. Expect a rise in CO alarms and in vague calls where everyone in the house feels sick — treat those as CO until metered otherwise. Headache, nausea and dizziness across multiple occupants in one dwelling is the pattern to watch. Meter on entry, meter in the dooryard, and treat a working alarm as real.

Ice arrives before snow does. Bridges, overpasses and shaded curves freeze first while open road still reads wet. Early-shift crews will hit black ice on the first runs of the day, often responding to someone who already did. Slow your own approach — a second unit into the same patch of ice is how a crash scene becomes two scenes.

Heating fires climb with the cold. Space heaters too close to furnishings, chimney fires in flues that were not cleaned, and overloaded circuits. The overnight hours carry the most risk because detection is slower when people are asleep.

For the medical side, cold exposure finds the people who were already vulnerable — the unhoused, older adults in under-heated homes, anyone who went down outside and was not found quickly. Hypothermia can hide behind an altered-mental-status or fall presentation.

What to carry into the shift: assume ice on untreated surfaces, meter for CO early rather than late, and expect the call volume to shift toward overnight and early morning. The forecast will catch up to what the cold is already doing.