Due to the evacuations, the territorial extent of the EDR is solidified (making this quite literally the WORST blunder ever made by the Elevians), while the few fires are contained using firebreaks. Guerillas, being a type of soldier familiar with scorched earth warfare, can operate pretty well in burning places, and in fact can exploit them against a conventional force. Additionally, more people join the EDR, seeing that the Elevians are by now completely indiscriminate with their destruction. The Great Lights within the EDR's territory are used to actually destroy Elevian planes, since there's unlikely to be enough lights and fuel (since they'd be powered by large, inefficient generators) to make the whole republic bright.
