7 Deadliest Disasters That Wiped Out Entire Cities Overnight

These are 7 real locations that went from completely normal to completely gone in hours. Ranked by death toll. From bad to unimaginable.🔍 What happened in these places? Why did a quiet lake in Cameroon kill 1,700 people in their sleep? How did a dam survive — while an entire valley didn't? What turned a Colombian town into a graveyard in under 4 hours? Chapters: 00:00 – Introduction 00:19 – #7 Lac-Mégantic Train Derailment 02:30 – #6 Dieng Plateau Gas Disaster 04:36 – #5 Lake Nyos Limnic Eruption 06:38 – #4 Vajont Dam Landslide 08:24 – #3 Armero Lahar 10:41 – #2 Mount Pelée Pyroclastic Flow 12:45 – #1 Bam Earthquake