A new beach hazard advisory is in effect in Southwest Florida.
The National Weather Service issued a red tide warning for Lee, Charlotte, Sarasota and Manatee counties Monday morning.
People exposed to red tide could experience respiratory problems including sneezing, coughing and teary eyes. The warning also means people are advised not to swim in the water because it can irritate your skin.
New data from the NOAA National Ocean Service shows there are high levels of red tide in Southwest Florida. The data was collected last week and a new report comes out every Monday.
In recent weeks, thousands of dead fish have been washing up on shores including sea turtles, manatees, groupers and sharks.
Red tide is impacting most of Lee, Charlotte and Collier counties.
Florida Fish and Wildlife collected water samples from all three counties and report all of them are experiencing high concentrations.
The new beach advisory is in effect until Monday night.
For most people, red tide is not dangerous but doctors say anyone with breathing issues should avoid impacted beaches.