Top photo: Imagine if much more of Paradise Valley were peppered by sprawling subdivisions? Photo by Todd Wilkinson. Above: A few years ago, lovers of the Yellowstone River received a wake-up call when thousands of fish died in the middle of summer, killed by a microscopic parasite that thrived in warm and low water conditions linked to drought (and climate change). The outbreak caused wildlife officials to shut down fishing and recreational rafting because of stress on fish populations. Photo courtesy Montana Fish Wildlife and Parks