The number of shark sightings reported so far this summer seems to be higher than usual as beachgoers dodge warnings at popular summer spots along the U.S. coasts to get out of the water. It seems like every year, there's an increased number of shark sightings or reports on beaches along the East and West Coast. YOUNG GREAT WHITE SHARK PINGS OFF CANADA'S COAST AS HE HEADS TO SUMMER FEEDING GROUNDSAccording to NOAA, more than 90% of the warming that has happened on Earth over the past 50 years has occurred in the ocean. When ocean waters warm, it causes a number of environmental concerns, and it can change the way certain animals behave. At one of his most recent pings, water temperatures showed 87 degrees, OCEARCH found.