When you get your pilots license you will understand effects that thermal air has on aircraft. A toy helicopter or toy drone is very susceptible to thermal air currents. These up and downdrafts can cause the loss of control of the drone by the operator. The loss of control of the Drone can result in injury to people in the drones operational area, or possible damage to equipment. Super heated air at a fire scene has a direct impact on air currents around the fire scene. The thermal air activity at a fire scene, and the possible loss of control of a toy drone, can also affect general aviation aircraft. It is but another reason why a drone operator should be required to obtain at a minimum a pilots license, in my opinion.
If I am flying my general aviation aircraft in and I am struck by a drone, the consequences could be fatal. A drone hovering over a fire scene, that happens to get caught in a superheated updraft, resulting in the loss of control of the drone itself, could climb hundreds or thousands of feet in an up draft, there by placing the general aviation community at risk. If a drone operator is in communication with local air-traffic control, the operational area of the drone can be avoided by general Aviation aircraft.