Ten-thousand feet high in the Sierras, and six miles from the nearest campground, I spotted three mylar party balloons snagged in willows. The next day, two more balloons were found in the Sierra wilderness. At home in Morro Bay, I find one or two balloons each week on the beach. How many more have drifted out to sea to be swallowed by marine mammals or sea birds mistaking them for squid?
If mylar balloons are caught in power lines, they can cause a short circuit that can lead to a power outage. Balloons are festive, but if you must use them as part of celebrations, please keep them tethered with a weight.