Shark week on Long Island continues as swimmers were ordered out of the water Thursday in the Town of Hempstead following a shark sighting at Lido Beach.

Town of Hempstead officials say at around 1 p.m. at Lido West two sharks were spotted close to shore and swimmers were ordered to get out of the water.

Town officials say the sharks were about 20 yards offshore.

Right after the Lido sighting another one happened at Long Beach. Long Beach officials say lifeguards confirmed two 3-foot blacktip sharks were spotted feeding off a school of bunker 200 yards offshore. Swimming was also suspended but has since resumed.

This all happened after shark sightings at Jones Beach on Tuesday. Also, a lifeguard at Jones Beach was bitten on Monday by what is believed to have been a shark.

Town of Hempstead Supervisor Donald Clavin says patrols will be ramped up to ensure everyone is safe.

"This was not just one spot, and this is not limited to this area," says Clavin. "This is multiple sharks spotted throughout the shoreline. You're talking about four miles of beach right here from Point Lookout to Long Beach. And we are going to take every precaution and keep this up the entire season."

Officials say since those initial sightings, sharks have not been seen since. Swimming has also resumed at Lido beach, but people are only allowed in up to their waists.

1. Safety in numbers. Stay in a group. Sharks are more likely to attack a solitary person than a group.

2. Beware of the dark. Avoid being in the water at night, dawn or dusk, when sharks are most active and not easily seen.

3. Out for blood: Do not enter the water if bleeding from an open wound or if menstruating—sharks are attracted to blood and their ability to detect blood is very keen.

4. Leave the bling behind. Do not wear shiny jewelry, because the reflected light resembles fish scales.

5. Avoid the feeding frenzy. Do not enter the water in areas where there are signs of baitfish, especially those used by sport or commercial fishermen. Feeding areas or areas where sewage, runoff or rivers flow into the sea are also dangerous. Diving sea birds are good indicators of these areas.

6. Tone it down. Use extra caution when waters are murky and avoid brightly colored clothing—sharks see contrast particularly well.

7. No splash zone. Avoid excess splashing and do not allow pets in the water because their erratic movements may attract shark attention.

8. Skip the local hangouts. Exercise caution when occupying the area between sandbars or near steep drop-offs—these are favorite hangouts for sharks.

9. Don’t panic. Do not enter the water if sharks are known to be present and evacuate the water swiftly but calmly if sharks are sighted.

10. Keep your hands to yourself. It goes without saying, but do not harass or provoke a shark if you do encounter one!