> +46 | Extreme heat stress (EHS) | Necessary periodical cooling of the organism, necessary supplementation of liquids > 0.5 l/h; avoid intensive physical activity. |
+38 – +46 | Very strong heat stress (VSHS) | Necessary periodical use of air-conditioned rooms or shaded areas; necessary supplementation of liquids > 0.5 l/h; limit physical activity |
+32 – +38 | Strong heat stress (SHS) | Necessary supplementation of liquids 0.25 l/h; recommended use of shaded areas, and periodical limiting of physical activity |
+26 +32 – | Moderate heat stress (MHS) | Necessary supplementation of liquids 0.25 l/h |
++9 26 – | Thermoneutral zone (TZ) | Physiological thermoregulation processes are sufficient to maintain thermal comfort |
0 – +9 | Slight cold stress (SlCS) | Recommended use of gloves and a hat |
−13 – 0 | Moderate cold stress (MCS) | Intensify physical activity and protect extremities and face from cold |
−27 – −13 | Strong cold stress (SCS) | Intensify physical activity and protect extremities and face from cold; recommended increase in the thermo-isolation properties of clothing |
−40 – −27 | Very strong cold stress (VSCS) | Intensify physical activity and protect extremities and face from cold; necessary increase in the thermo-isolation properties of clothing, and limited time spent outdoors |
< −40 | Extreme cold stress (ECS) | Limit time spent outdoors to the necessary minimum; necessary increase in the thermo-isolation and wind-proof properties of clothing |