Which exposure side should be covered first?

In firefighting operations, the leeward or downwind side is prioritized for coverage first because it is important to protect this area from the spread of fire and heat. This side is less likely to be directly impacted by the flames due to the wind direction, making it a strategic location for suppression efforts. By addressing the hazards on the downwind side first, firefighters can prevent the fire from moving in that direction and mitigate risks to structures or resources located in that vicinity.

Furthermore, the windward or upwind side, while it also presents a significant threat due to the fire's potential to grow and spread, can often be more immediately affected by flames and heat. Engaging the leeward side first allows firefighters to establish a defensive position and work to protect against potential fire spread without being overwhelmed by active flames coming from the windward side.

Covering both sides at the same time can dilute efforts and resources, making it more challenging to effectively manage the fire. By prioritizing the leeward side, firefighters can create a more focused and effective attack strategy.