What characterizes dry lightning?

Dry lightning is characterized by the occurrence of lightning in conditions where there is little to no precipitation, which is why it is often associated with a dry atmosphere. It typically happens during hot and dry weather conditions when thunderstorms develop but do not produce rain that reaches the ground. This phenomenon can lead to increased wildfire risk because the lightning strikes can ignite dry vegetation without any accompanying rain to dampen the flames.

Understanding the significance of dry lightning is crucial for firefighters and emergency responders, as it indicates where and when fire risks may be heightened. The other options do not accurately describe dry lightning as effectively, making the identification of dry lightning by the absence of rain the most defining characteristic.