It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Holy Prophet (peace and blessings be upon him) said: Once the fire of Hell complained to its Lord, saying, "One part of me has consumed another part." Allah granted it permission to breathe twice a year. Because of this, the extreme cold is due to the coldness (zamharir) of Hell, and the most intense heat is also the effect of the heat of Hell.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 7722