It’s official now: June 2019 was the hottest June ever recorded worldwide. From sunstrokes to wildfires, the hazards of heat waves are manifold. To avoid indoor risks like cable fires, caution is required during heat waves, especially regarding electric appliances. Studies have shown that higher ambient temperatures can lead to reduced transmission capacity of power cables, while the peak electricity load increases simultaneously. That can result in overheating of power cables and therefore also to cable fires. This even applies to underground cable networks up to one meter below surface level where most cables are installed. Imagine your daily electric appliances, like refrigerator or air conditioning, failing in the middle of a heat wave! While that thought is uncomfortable, the possibility of a cable fire in a public place, like the subway or the mall, is straight-up frightening.