Hot water doesn't kill the coronavirus. COVID-19 can be transmitted in hot weather and cold weather.
There is no evidence that any of these measures will prevent or cure COVID-19. Taking shower in a hot bath can alter the normal body temperature – but it does not kill the virus. The coronavirus can be killed at a temperature of 158°F and higher, but there are no effects on coronavirus in normal body temperature (97.7°F to 98.6°F). Taking an extremely hot bath can lead to scalding injuries or external burns, as reported by the Harvard School of Public Health.
WHO has debunked this myth, stating that social distancing and washing hands frequently are the recommended ways of reducing the risk of contracting COVID-19.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19, including symptoms, prevention, and available treatment, please refer to the World Health Organization or your national healthcare authority.