Final answer:
Wind-driven fires necessitate a tactical shift to the leeward side of a building due to the intensification of the fire by the wind.
Step-by-step explanation:
Wind-driven fires that require a tactical shift will almost always be on the leeward side of the building. This is because the wind will push the fire towards this side, making it more intense and dangerous. It is essential not to attack from the leeward side, as this is where the fire will be most intense due to wind-driven flames and increased fuel supply. Instead, firefighters should position themselves on the windward side to combat the fire more effectively and safely.