While a lunar colony thankfully wouldn't have to account for hurricanes or other extreme atmospheric weather events, it'd have to shore up against an invisible—but highly hazardous—threat: solar storms. Unlike the Earth, the moon has no magnetic field to protect against highly charged electromagnetic particles emitted by the sun. During particularly intense solar flares, which eject bursts of high-energy light waves from beneath the sun's surface, even the Earth can't fully shield our electricity infrastructure from going haywire. Without that crucial magnetic field, a solar storm engulfing a lunar settlement could be potentially disastrous for human health and infrastructure. Thus, we'd have to use substances like water or polyethylene, which contain concentrations of hydrogen high enough to absorb the impact of these rogue space particles, to protect buildings on the moon from solar radiation.