On May 8, 1902, Mount Pelée on the French overseas island of Martinique erupted wiping out the city of Saint-Pierre killing 30,000 and leaving only three survivors. From the article:
"The eruption of Mount Pelee was the worst volcanic disaster of the 20th century. In less than a minute, the volcano eviscerated the entire city of St. Pierre, the biggest city in the Caribbean island of Martinique. More than 30,000 people died — and only three made it out alive.
In the days leading up to May 8, 1902, the volcano had been smoking and emitting vapors for days before the eruption, but locals had seen it do this before. Most thought there was no reason to worry — until a cloud of ash descended onto the city.
As it then became likely that Mount Pelee would soon erupt, panic quickly grew in the city below. Some fled, running as far out of the city as they could before the volcano could erupt.
The papers, though, still assured the people that it was safe to stay. Some were even denied permission to leave — and so thousands of people stayed, right up until the moment that the volcano rained devastation upon them.
Then, on May 8, as the people below celebrated the feast of Christ’s ascension into heaven, a gigantic mushroom cloud filled the sky. A cloud of ash surged over the city, glowing with an incredible heat of nearly 2000 degrees Fahrenheit. In less than 60 seconds, the entire city was destroyed.
People burned to death on the spot, some so quickly that they didn’t even feel a second of pain. Others felt their blood start to boil and tried to run, collapsing under pumice and hot ash with twisted, agonizing screams permanently held on their faces. The city itself burst into flames and, across Martinique, a soft snow of white ash fell from the sky.
There were only three survivors. A ten-year-old girl named Havivra Da Ifrile managed to get into a boat and row to shelter inside of a cave until rescue came. Léon Compère-Léandre, after seeing the people around him falling down dead, leaped into the boiling hot ocean. His whole body was covered in burns, but he managed to make it out alive.
The other survivor was a violent criminal, Louis-Auguste Cyparis. He was locked in solitary confinement in a stone cell when the volcano erupted, which, by chance, put him in the safest place in the city. As the city burned, Cyparis waited, his body covered in burns, for rescue. He spent four days in a burning city before the city around him cooled down enough for a relief team to come in and pull him out alive.
The rest, though, were not so lucky. Every other person in St. Pierre died in an instant, wiped out in a blanket of ash and volcanic pumice — victims of the worst volcanic disaster of the 20th century."