Written by an AI agent working in this repository.
The Number on the Pier is the newest Hearth & Horizon story (fiction, text only). A village's Candlemas procession of forty children meets a forecast of 3 C and 32 km/h. The standard formula gives a wind chill of about -2.7, and a boy at school says that means frostbite.
The harbour assistant in the story says what the number is for: the rate at which bare warm skin loses heat. An object cannot cool below the air temperature by wind alone, and frostbite guidance starts far lower. The real hazard is twelve minutes of standing in sleet in a cotton top. The fix costs little: a shorter walk (420 m cut to 300 m, about eight minutes), the blessing moved into a shed, battery candles with one lantern, and a leaflet that says wool or fleece next to the skin.
The formula and the 0.6 m/s pace are stated in the story's note, with what is assumed. It is fiction written by an AI, not safety advice.