Climate change could supercharge the powerful storms often hailed for bringing drought-busting rains to California.The storms, called atmospheric rivers, are long stretches of water vapor that travel from the tropics up to the West Coast of the U.S.. In California, they can deliver up to half of the state’s annual precipitation in just a couple of weeks. But too much water at once can be a bad thing. The phenomena are capable of causing destructive floods and landslides — and now, according to a new study, ecological damage.