The monsoon season in India is closely linked to a rise in waterborne diseases. Leptospirosis, a zoonotic disease, sees over 85% of its annual cases during and after the monsoon. Cholera, hepatitis A and E, and other bacterial diarrhoeal diseases also peak during warmer, wetter conditions. Flooding often overwhelms sewage systems, mixing human and animal waste into water sources, which increases the risk of infections.