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Toxic algae blooms have shown up in Lake Mendota near UW-Madison's Memorial Union and the Hoofers Sailing Club pier, according to the university.
The university issued a warning to use caution along the shore and not swim at night when the blooms can't be seen.
The blue-green algae blooms were first spotted Tuesday morning.
The blooms are made of cyanobacteria, which can release toxins that can cause significant harm to humans and animals.
Symptoms of a reaction to the algae blooms include eye, throat, nose...