Blue-green algae blooms are likely this summer. That warning from the Lake Zoar Authority. Exposure in high levels is a suspected cause of illness as severe as Lou Gehrig’s disease. The authority says the neurodegenerative disease can be fatal to pets and livestock. Runoff from fertilizer, chemicals and waste elevates the blooms. They float on the surface of the water and look like green paint. A dry season intensifies the toxicity whereas a rainy climate dilutes the presence of the bacteria-like growth.