

They might be smoke testing the system, looking for leaks! Smoke is pumped into water pipe infrastructure and leaks out of potential cracks or undisclosed/illegal sources (such as a company dumping into the sewer system without disclosing it to the city). They do this so they can locate and fix these sources so the water remains uncontaminated by groundwater seepage.
A higher number indicates a stronger enemy, so seeing a single creature with such a ridiculously high number means that is probably either God or the Devil himself taking the form of a lemur and he is here to cause Pain