For the time being, it is not safe for pets or people to go into the water at Lake Elsinore, the city warned Tuesday. The reason is high levels of toxins from algae were found in the lake. … Lake users are advised to stay out of the water until further notice, including boating and other water recreation activities. People should also keep their pets out of the water and not eat fish caught in the lake, according to the city. The toxins are enough to kill pets and make humans sick, the city reported. In humans, symptoms of exposure include diarrhea, vomiting, skin rashes and eye irritation. Pets may experience diarrhea, vomiting, convulsions and death, according to the notice.