Final answer:
Warm weather affecting ski resort operations is most pronounced in North America and Europe due to changing climate conditions leading to less snowfall.
Step-by-step explanation:
Unseasonably warm weather leading to the early closure of ski resorts is being experienced on multiple continents, but notably in places like North America and Europe, where climate change is influencing seasonal temperatures and weather patterns. In North America, increasing temperatures during both the summer and winter seasons are bringing about hotter, drier conditions that result in less snowfall and are detrimental to ski resort operations. Similarly, in Europe, the Alpine regions, which are typically associated with cold, snowy winters, are experiencing warmer weather that affects their ski seasons.