What is the Most Dangerous Natural Disaster? Tornadoes occur when humid, warm air collides with dry, cold air, creating an updraft that begins to rotate and fuel powerful winds. They often occur before or during a thunderstorm. Previous Next Pages: 1 2 3 4 5 6 7 8 9 10 cyclones Droughts Earthquakes Extreme cold Extreme heat flood Hurricanes Landslides Most Dangerous Natural Disaster Natural Disaster Tornadoes Typhoons Volcanic Wildfires 2024-02-01 MahdisM