Here's why:
* Thick fur: Their dense fur coat provides excellent insulation in the Arctic, but it also makes them overheat in warmer temperatures.
* Limited sweating: Arctic foxes don't sweat much, which limits their ability to cool down.
* Limited shade: Arctic regions offer little shade from the sun, which can be a problem in hot weather.
* Limited access to water: Water sources are scarce in the Arctic, making it difficult for them to stay hydrated in hot conditions.
While they may be able to tolerate short periods of warmer weather, prolonged exposure to heat can be dangerous for Arctic foxes.
Climate change is a significant concern for Arctic foxes, as rising temperatures are reducing the extent of their suitable habitat.