Sunburn

The first solar eruption was long expected. The intensity was not. In an instant, all the electronic devices fried, alongside the major part of the population. Suddenly, all the things that we relied on failed. As it turned out, human life couldn't be sustained without the support of modern technology. If having a broken phone or a burned computer was a bummer, the biggest issues were with the system itself. Healthcare, transportation, and even energy production were unavailable. This meant cars, planes, and modern trains went crashing without brakes. Boats were reduced to floating husks of metal. And worst of all, the nuclear plants could not be regulated anymore, and those still running were guaranteed to run amok in the following days. And sure they did.   Several eruptions later, the survivors are gathered in underground shelters scattered all over the world, isolated from each other by vast regions of radioactive desolation. Their only mean of communication is the old trains that are still able to function without any electronics. The brave crews of these trains face the toxic air of the surface, the risk of solar eruptions that rampage the scorched land, and bands of sunburned, people that survived the initial catastrophe but got irremediably scarred, losing common all common sense and returning to a primal state.