Hot showers cannot prevent you from COVID-19. Your normal body temperature stays around 36.5°C to 37°C regardless of the water temperature. In fact, bathing in very hot water can be dangerous, as it can burn the skin.

The best way to protect yourself from COVID-19 is to wash your hands frequently with soap and running water or, if not available, alcohol-based hand rub (60%). By doing this, you eliminate any viruses that may be on your hands and avoid infections that can occur from touching your eyes, mouth, and nose.

source: WHO