Which heat-loss mechanism is the most effective in warm, humid weather?

In warm, humid weather, evaporation is the most effective heat-loss mechanism. This is primarily due to the way our bodies cool down through perspiration. When the body temperature rises, sweat glands produce moisture on the skin's surface. As this sweat evaporates, it requires energy in the form of heat, which is drawn from the skin and the underlying tissues, effectively cooling the body down.

In warm and humid conditions, the air already contains a high amount of moisture, which can impede the rate at which sweat evaporates. However, evaporation is still the primary way for the body to release excess heat, especially when the ambient temperature is hotter than the skin temperature. Although other mechanisms like conduction, convection, and radiation also play a role in heat loss, they are far less effective in conditions where humidity is high. Conduction and radiation are not substantial in terms of cooling the body, particularly because conductive heat loss requires a temperature gradient between the body and the surface it's in contact with, and radiation relies on heat exchange with the surrounding atmosphere, which is less effective when the air is saturated with humidity. Convection can contribute to cooling as air moves over the skin, but it is also limited in high humidity conditions. Thus, evaporation remains the most effective