Thermia

A realism overhaul of survivor thermodynamics. Vanilla drives hypothermia and heatstroke from ambient temperature alone. Thermia adds wind, humidity, exertion, exposure, and clothing as separate channels into a single felt temperature. This mod is a work in progress Wind chill The 2001 NWS / Environment Canada Wind Chill Index applies below 10°C with at least 5 km/h wind. A logger at -10°C in 30 km/h wind feels -20°C. Clothing wind-chill resistance, a new equipment property on every garment, blocks most of the effect when properly bundled. Heat index The NWS Rothfusz regression raises felt heat in humid conditions above 27°C and 40% RH. A farmer harvesting at 32°C in 80% humidity feels 44°C and accumulates heatstroke fast. Dry heat at the same temperature is more survivable: sweat still evaporates. Wind cooling Above 10°C, where wind chill no longer applies, wind still affects how the air feels. A breezy 18°C afternoon feels 2-3°C cooler. In humid heat a fresh wind partially offsets the heat index. In extreme dry heat, wind starts adding heat instead: the simoom effect. Metabolic heat from exertion Active colonists generate body heat. Combat runs 2x baseline, mining 1. 8x, farming 1. 3x, sleeping 0. 7x. Heavy labor in cool weather keeps a survivor warm; the same labor in humid heat is doubly punishing, because the heat-index curve steepens with body temperature. Exertional heatstroke is now possible. Wet clothing Soaked clothing loses up to 70% of its insulation. Rain and thunderstorms saturate clothing slot by slot; drying happens with temperature, wind, and time indoors. Working in wet kit through a cold front accelerates hypothermia. Evaporative Cooling Soaked clothing will provide a cooling effect, the strength of the effect depends on the relative humidity, strongest in dry weather, weakest in humid weather. Frostbite A localised cold-injury system separate from hypothermia. Extremities freeze faster than the core, so hats and shoes give targeted protection. Three