Illipah Reservoir in central Nevada has vanished. In a normal water year, these wild horses would need snorkels. Instead of trout habitat, Illipah has returned to its former self — a windy, parched flat. The horses — four adults and one foal — spend the heat of the day dozing, the only movement the swishing of tails. A trickle of water runs in the tiny gully, all that’s left of the creek. Short-cropped grass tenaciously colonizes the lakebed.

This scene speaks of extreme drought, but also hope. How else to read the faint green grass, the offering of water, the cooling wind, and the sleeping foal?