Leptospirosis is a bacterial disease that affects both humans and animals worldwide. Clinical symptoms of leptospirosis in humans range widely, from mild to severe illness, with symptoms that can include severe jaundice, acute renal failure, hemorrhagic pneumonia, and meningitis. We present a detailed clinical description of a 70-year-old man with leptospirosis. This case presented without the typical prodromal period for leptospirosis, thus making diagnosis more difficult. This isolated case occurred in the Lviv region during the ongoing military conflict between Russia and Ukraine where Ukrainian citizens have been forced to hide in premises that are not properly adapted for their long-term stay, which result in conditions that can potentially lead to the emergence of many infectious diseases. This case highlights the need for heightened awareness into the symptoms of a variety of infectious diseases, including but not limited to leptospirosis.