The Saskatchewan Health Authority has issued a blue-green algae warning for Little Manitou Lake. In a statement issued Friday, the SHA says people and pets should stay out of the water where the algae — which can cause rashes or other skin irritation, sore red eyes, fever, nausea and vomiting and/or diarrhea — is present. "Symptoms usually appear within one to three hours and resolve in one to two days. Symptoms in children are often more pronounced; however, all humans are at risk of these symptoms," the SHA statement reads.