Migration behaviour of the Inhabitants of Meghna Estuarine region has been affected by several social, economic and natural causes. This migration has been thought as a part of social behaviour in this region. It has been predicted in several international researches that, human migration is going to be the worst possible effect triggered by the changing climatic scenario (IPCC, 2007). Natural hazards are also very much responsible for human migration. Purpose of this research is to find out the pattern and factors of natural hazards induced out-migration in Meghna Estuarine Islands of Bangladesh. In this empirical research, primary data has been collected through three-stage socio-economic survey. From this research it has been seen that, natural hazards like river bank erosion, saline tide, flood, cyclone, storms cause extreme havoc to the life and livelihood of the inhabitants of Meghna Estuary islands. Many of these situations force inhabitants to migrate temporarily or permanently. Indirectly these hazards also affects migration behaviours by affecting natural resources and income sources of inhabitants of this region. Natural hazards have two types of effect on migration behaviour; one is forcing rapid migration by riverbank erosion, cyclone etc. and the other is making situations for slow migration decision by disturbing the regular economic, social and environmental system. Two types of out-migrations are prominent in these islands; permanent household migration and partial migration -and these migration behaviours have been influenced by natural hazards of these study areas.

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On 22 March 2013, a tornado swept over the Brahmanaria and Akhura Sadar Upazila (sub-district) of Brahmanaria district in Chittagong Division of Bangladesh and caused 35 deaths. There were also high levels of property damages. The aim of this paper is to present the geographical characteristics of Brahmanaria tornado and the detail of damages it has done. Through this we will assess the components at risk of tornado in the context of rural Bangladesh. Research shows that, though small in nature and size, Brahmanaria tornado was very much catastrophic -mainly due to the lack of awareness about this natural phenomenon. This tornado lasts for about 15 minutes and traveled a distance of 12 kilometer with an area of influence of 1 square kilometer of area. Poor and unplanned construction of houses and other infrastructures was also responsible for 35 deaths, as these constructions were unable to give any kind of protection during tornado. From this research, it has been seen that human life, poultry and livestock are mostly at risk of tornadoes in case of rural Bangladesh. Inhabitants of this region are completely unaware of the life and property saving measures necessary to take during tornado. This tornado caused high level of human death and casualties and it will take a long time for the affected to overcome the losses.