Pompeii was a Roman city that was destroyed by a volcanic eruption of Mount Vesuvius in 79 AD. The eruption was so powerful that it buried the city under a layer of ash and pumice. The city was completely destroyed and its inhabitants were killed.
Today, the city of Pompeii is a UNESCO World Heritage Site and is a popular tourist destination. The city has been excavated and many of the buildings have been restored. However, the city is not in the same danger as it was in 79 AD.
Mount Vesuvius is still an active volcano, but it has not erupted since 1944. Scientists have been monitoring the volcano and have developed a system of warning people if there is a risk of eruption. If there is a risk, people are evacuated from the area.