I did. That's what this movie was. I first saw it when I was fifteen. Due to a series of solar flares, most of the people on die leaving nothing but white powder and empty clothing. A handful of survivors, including the Anders family, try to repopulate a depopulated planet. So why did the family patriarch, played brilliantly by 7th Heaven's Peter Graves, and his kids survive while his wife and so many others died? They had a gene that made them immune to the effects of solar flares. What happened to the animals? They went insane. Those who survived had to fend for themselves. When the Anders' Volkswagen bus ran out of gas, they had to siphon it from the gas tank of a car from somebody who died. Eventually, they meet up with other survivors and the rest you'll have to find out for yourselves. Too bad it hasn't been released on DVD.
Review of Where Have All the People Gone
