In New York City there is a web site showing maps of stray voltage locations in the city. This site was created by a group founded because of the death of Jodie S. Lane who was killed by stray current in Manhattan.
Boston had a series of dog deaths in the 1990s because of stray voltage.
In 2009 Toronto Hydro pulled all employees off their regular duty to deal with stray current issues. This coming after a series of reports with children being shocked.