Harpswell, a coastal town in southeastern Maine, was the site of Maine’s first deadly shark attack five years ago, which claimed the life of Julie Dimperio Holowach, 63, a seasonal resident.

There were two documented sightings of great white sharks off the coast of Bailey Island, the site of Maine's first fatal shark attack.

As Americans flock to beaches at the peak of summer, a spike in shark sightings is prompting new safety measures. Officials say cleaner water is bringing in more bait fish who attract more sharks. NBC’s Jesse Kirsch reports for TODAY.