The National Weather Service announces a great risk for rip currents on Monday, since lifeguards have fought for rescuing swimmers this weekend. Red flags will be hanged along the Jersey shore to announce swimmers about the rip currents risks.

This weekend, a swimmer drowned and another one got lost while swimming off the Wildwood beach. Another swimmer died after he had been rescued by lifeguards in Atlantic City on Saturday afternoon.

A rip current is a fast-moving current that carries water away from the beach. The water has to go somewhere as the waves are pushed ashore, so it escapes in rip currents that sometimes carry swimmers out to sea too.

Officials say that rip currents are dangerous when the high tide goes out, thing that happens sometime between 5:00 a.m. and 11:00 a.m. and 5:00 p.m. to 11:00 p.m. Forecasters, through the National Weather Service, told the swimmers to be careful tonight, as the risk of rip currents is increasing.

The weather service forecast announced that the chance of storms dropped to 30% chance tonight and the high tide is expected to reach 87. Winds are supposed to be out to the southwest today, according to the Virginia department of Environmental Quality.

Tropical storm Bertha, which was considered as a big threat for this seasons’ tropical storms, is hundreds of miles away and continues to develop in the Atlantic. Another storm system in the Atlantic could develop in the next few days, so the two storms will give a higher risk of rip currents.