For scientists measuring the risks associated with wildfires, the most helpful data would be "drought conditions in an area" and "types of vegetation found in an area."
Drought conditions can significantly increase the likelihood of wildfires, as dry conditions make vegetation more flammable. Additionally, the types of vegetation present in an area are crucial because different plants have varying levels of flammability and can influence the intensity and spread of fire.
While the number of people living in an area and the frequency of severe storms can provide context for potential impact and emergency response planning, they are not as directly related to the risk of wildfires as the other two factors.