A sailboat navigates around a land mass barely breaching the waterline as seen from the Historic Railroad Trail in the Lake Mead National Recreation Area. With historic low water levels, boaters face new obstacles with each elevation change.

As night falls over Lake Mead, lights at the marinas at Hemenway Harbor glow as seen from the Historic Railroad Trail in the Lake Mead National Recreation Area.

As night falls over Lake Mead, lights at the marinas at Hemenway Harbor glow as seen from the Historic Railroad Trail in the Lake Mead National Recreation Area.

Tourists walk along Las Vegas Boulevard near the Linq Hotel and Casino. Many sidewalks are protected from traffic lanes by physical barriers, where others are not. Moving pedestrians along the Strip safely has become a major effort over the years.

Tourists walk along Las Vegas Boulevard near the Linq Hotel and Casino. Many sidewalks are protected from traffic lanes by physical barriers, where others are not. Moving pedestrians along the Strip safely has become a major effort over the years.

Tourists walk along Las Vegas Boulevard near the Linq Hotel and Casino. Many sidewalks are protected from traffic lanes by physical barriers, where others are not. Moving pedestrians along the Strip safely has become a major effort over the years.

Tourists walk along Las Vegas Boulevard near the Linq Hotel and Casino. Many sidewalks are protected from traffic lanes by physical barriers, where others are not. Moving pedestrians along the Strip safely has become a major effort over the years.