All Martin County beaches with lifeguards are open Tuesday.
They were closed Monday after what was being described as an “unknown airborne irritant” caused people to become sick over the weekend.
Researchers at FAU Harbor Branch took water samples at Bathtub Beach Monday and confirmed their samples showed red tide algae (Karenia Brevis) is present there.
However, Martin County said it was awaiting additional tests and results.
Should Martin County need to close beaches to swimming, lifeguards will post double red flags.
The Florida Fish and Wildlife Conservation Commission confirmed earlier Monday that red tide was present in Palm Beach County.
Delray Beach said its beach will be open Tuesday.
All Palm Beach County beaches from Lake Worth Beach north to the Martin County line will remain closed on Wednesday. Lifeguards and staff at Palm Beach County beaches reported continued irritation, according to Palm Beach County Public Affairs Department.
