New Hampshire environmental officials are warning about bacteria blooms after advisories for swimmers and pets were issued for two popular lakes.The cyanobacteria advisories come as peak summer nears when many Granite Staters will be cooling off at local lakes and ponds. Officials at the Department of Environmental Services said two blooms have been discovered in recent days, one at Opechee Lake in Laconia and the other at Silver Lake State Park Beach in Hollis. Cyanobacteria is a natural component of fresh water. It's found across New Hampshire, but under certain conditions, it can grow out of control. It produces toxins that can be harmful to humans and animals, causing gastrointestinal issues, seizures and, in severe cases in animals, death. "The symptoms in humans and pets can be gastrointestinal issues," said Kate Hastings, of the Department of Environmental Services. "With some of the neurotoxins — numbness, tingling or seizures and in severe cases, especially in pets is death."There are signs to look out for to help spot the bacteria."Sometimes, people describe it as spilled paint," Hastings said. "It can really take different forms, but basically, if the water doesn't look super clear, stay out. When in doubt, stay out." The DES is asking Granite Staters to report any other sightings. "Basically sending in pictures of what you're seeing is super helpful so we can see what's going on. Then we will go out and get samples to see what cyanobacteria cells are there," Hastings said. "There is, unfortunately, no quick fixes for it. It is all about controlling nutrients in water bodies."Anyone who recently went swimming at Opechee Lake or Silver Lake who's experiencing symptoms is advised to follow up with a doctor. Pets exhibiting symptoms who had been in either of the lakes should be taken to a veterinarian.