Which of the following is NOT considered an indicator of a possible radiological incident?

Microwaves are not considered an indicator of a possible radiological incident. Radiological incidents typically involve the release of radioactive materials or radiation, which can often be measured in terms of radiation levels. Standard indicators of such incidents include detecting abnormal radiation levels, observing unusual animal behavior that may indicate exposure to radiation, and noticing strange odors associated with certain radioactive materials or their byproducts.

In contrast, microwaves pertain to a different spectrum of electromagnetic radiation that is not typically indicative of radiological hazards. While they can pose health risks and have various industrial and communication applications, they do not serve as a recognized sign of a radiological event.