At what temperature can tissue freezing begin to occur regardless of wind?

Tissue freezing, also known as frostbite, typically begins to occur when the temperature drops significantly below the freezing point of water, which is 0 degrees Celsius (32 degrees Fahrenheit). The correct threshold for tissue freezing to commence is generally recognized as below -1 degrees Celsius (30.2 degrees Fahrenheit). At this temperature, skin and other tissues are at risk of freezing, even in the absence of wind chill, which can exacerbate the effects of cold exposure.

This understanding is critical for individuals working in environments where they may be exposed to extreme cold, as it informs protocols for mitigating risks related to cold exposure. In contrast to other provided options, which either suggest temperatures too high for tissue freezing to initiate or are not consistent with established physiological thresholds, this answer accurately reflects the scientific consensus on tissue freezing risk.