There is debate based on the logic of fire, summer and the south as to whether feng shui should be changed for the southern hemisphere.
[2] In Traditional Chinese Medicine, Fire is associated with the Heart, the Emperor or Sovereignty therefore Virtue, Its attributes are considered to be dynamism, spontaneity, and enlightening; however, it is also connected to restlessness when out of balance and is burning out of control.
In the same way, fire provides heat and warmth; however, an excess can also burn too bright leading to dehydration, listlessness, and exhaustion.
[3] The organs associated with the Fire element are the Triple Heater, Heart and by extension the cardiovascular system (yin) and small intestine (yang), tongue and a body's pulse.
The South corner releases energy of Fire as I Ching and Feng Shui states.