Why Are Sharks Attacking North Carolina Swimmers?

Shark experts say a coastal drought, warm water and a surge of fish and sea turtles could be to blame.
2:06 | 07/03/15

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Transcript for Why Are Sharks Attacking North Carolina Swimmers?
The holiday weekend will drive millions of people to America's beaches. In North Carolina big concerns about the possible danger lurking in the ocean. Seven shark attacks in three weeks. Some saying those beaches should be closed before another attack happens. ABC's Phillip Mena looks at why this is becoming the summer of the shark. Reporter: Sharks attacking swimmers at an alarming rate. Tourists on edge. I wouldn't go out there, not now. Reporter: Some even calling for beach closures. North Carolina's governor warning beach Goers. Use your common sense and listen to what the life guards and local authorities are saying. Reporter: A few beaches dispatching park rangers to warn swimmers to stay close to shore. All this after two attacks in two days. I felt just a tinge of pain in my leg and I, like, looked back and saw the shark swimming away. Reporter: Nine attacks in three weeks along the Carolina coast. Seven in North Carolina alone. But why so many here? Shark experts say this year could be a perfect storm. A coastal drought means saltier water. Factor in 80 degree water, a mix sharks love. Add in a surge in fish and sea turtles. Lots of people in the water, lots of sharks, lots of food, and that's a bad mix. Reporter: While the increase in shark attacks have scared off some here in the Carolinas, as you can see there are many more who weren't afraid to go in the water. It seems there's no escaping sharks this summer. This fisherman off Florida capsized after he accidently hooks a shark and makes a quick escape back to his boat. But for tourists like this woman who came to North Carolina for vacation, yesterday's attack just feet from here has her keeping a watchful eye. Did you have a talk with them? Oh, absolutely. We told them not to go past their knees and stay close. Reporter: Tonight the coast here continues to fill up ahead of fourth of July weekend. And as of right now, these Carolina beaches will remain open.

This transcript has been automatically generated and may not be 100% accurate.

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