What are the primary weather conditions that can impact aerial firefighting?

The primary weather conditions that can impact aerial firefighting include wind, humidity, temperature, and precipitation. Wind can significantly affect both the movement of the fire and the flight path of aircraft. High winds can make it difficult for pilots to control their aircraft and can cause fire to spread unpredictably. Humidity levels influence how easily vegetation can ignite; lower humidity typically raises the risk of fires due to drying conditions. Temperature affects fire behavior and also the performance of the aerial firefighting equipment, as higher temperatures can lead to increased fire intensity. Precipitation is crucial as it can either help suppress a fire or, in the case of heavy rain, can create unsafe flying conditions and reduce visibility.

These four factors collectively create a comprehensive view of the weather's influence on aerial firefighting operations. Other options may include considerations that are less critical or do not directly impact aerial firefighting, making them less suitable.