This topic includes: Tropical cyclone (General characteristics, Global distribution, Structure , Cyclone formation and dissipation, Cyclone naming, Cyclones in Bangladesh), Tornado (General characteristics, Formation, Prediction and warning), Disaster risk reduction measures for cyclone and tornado, Cyclone shelter design consideration (Sustainable use, Number, capacity and location of cyclone shelter, Building design standard, and other facilities), Building construction consideration for cyclone prone area (choosing site, building shape, building pattern, roof design, doors and windows)