Fire Sticks

The silver space ship hovered invisibly over the sweltering city of Adelaide. Its two occupants took one last look at planet Earth before the ship disappeared up beyond the stratosphere.

They had done the best they could.

A full cargo hold of rods had been dispersed around the globe, Adelaide, the hottest city on the planet that day, being the last stop. The best thing was that, once activated, the field emitted by the rods would radiate out to eliminate all the bushfires within a matter of hours. The shortest alien smiled to itself at the thought of how grateful the humans would be.

Though of course, bushfires weren't the only heat sources the energy-eaters would consume.

Like fire itself, the energy-eaters had more than one use.