What happens to relative humidity when air temperature increases?

When air temperature increases, relative humidity decreases. Relative humidity is the measure of how much moisture the air contains compared to the maximum amount it can hold at a specific temperature. As the temperature rises, the air's capacity to hold moisture increases. If the actual amount of moisture in the air remains constant while the temperature goes up, the relative humidity will drop because the air can now hold more moisture than it currently has. This decrease can lead to drier conditions, which are especially important to consider in wildland fire behavior, as lower humidity can enhance evaporation rates and contribute to more aggressive fire activity.