Botswana:
periodic droughts; seasonal August winds blow from the
west, carrying sand and dust across the country, which can obscure
visibility
Bouvet Island:
NA
Brazil:
recurring droughts in northeast; floods and occasional frost
in south
British Indian Ocean Territory:
NA
British Virgin Islands:
hurricanes and tropical storms (July to
October)
Brunei:
typhoons, earthquakes, and severe flooding are very rare
Bulgaria:
earthquakes, landslides
Burkina Faso:
recurring droughts
Burma:
destructive earthquakes and cyclones; flooding and landslides
common during rainy season (June to September); periodic droughts
Burundi:
flooding, landslides, drought