Water safety experts, along with Long Island officials, are urging parents and children to practice caution when in or around pools or beaches, especially following a dangerous holiday weekend.

Four people, including two children, died in the past week in backyard swimming pools.

They say teaching kids not to swim alone, assigning a person to watch the water at all times, even choosing a color of bathing suit that is easy to see can make a big difference.

The Town of Oyster Bay teamed up with Catholic Health St. Joseph Hospital Monday for a Summer Pool Safety day. They taught hundreds of kids tips on how to keep safe in the water and what to do if they are in an emergency situation.