The US gets 3 of every 4 tornadoes on Earth — but not all. A country-by-country tour of global tornado activity, deadliest events, and how each country tracks them.
By far the world's tornado leader. Ideal geography — a wide flat interior with Gulf moisture to the south, cold air from Canada to the north, dry desert air from the Rockies to the west — creates the perfect ingredients. Most of Earth's F5/EF5 tornadoes have happened here.
Not many by count, but the deadliest per event by a wide margin. Bangladesh's densely populated agricultural areas, low-quality housing stock, and warm humid pre-monsoon atmosphere produce lethal spring tornado outbreaks. The 1989 Daulatpur–Saturia tornado killed approximately 1,300 people, the deadliest tornado ever recorded worldwide.
Second most tornadoes globally. Alberta, Saskatchewan, Manitoba and Ontario are all active zones. The only F5 tornado ever confirmed outside the US struck Elie, Manitoba on June 22, 2007. Environment and Climate Change Canada runs the official reporting.
The pampas of central Argentina are the second-most tornado-prone region on Earth after the US Plains. Similar geography — flat, extensive moisture from the Atlantic, cold air from the Andes. Argentina has produced some of the strongest tornadoes measured outside the US, including a possible F5 in December 1985 near Rosario.
By far the highest tornado density per square mile of any country — but the tornadoes are almost all weak. Small, brief, often T0-T3 on the TORRO scale (roughly EF0-EF1 equivalent). The 2005 Birmingham (UK) tornado was a rare T5 that damaged 1,000+ homes.
Under-reported. Australia's Bureau of Meteorology has strengthened tornado reporting in recent years. Most active zones are New South Wales and Queensland. The 2003 Canberra fire tornado is the first officially documented pyrotornado in the world.
Central Russian tornadoes are rare but occasional. The June 1984 Ivanovo outbreak in the USSR killed 400+ people and included at least one F4 tornado.
Small country, high density of population, so any tornado is a news event. Most are weak, though the 2006 Nobeoka F3 killed 3. The Japan Meteorological Agency uses a Japan-specific rating scale.
Italy, France, Germany, Netherlands, Belgium, Poland and Czechia all get tornadoes. The June 2021 Moravia tornado in the Czech Republic was rated F4 and killed 6 — the strongest documented European tornado in decades. European Storm Forecast Experiment (ESTOFEX) maintains an active database.
Southern Brazil, especially Rio Grande do Sul, gets occasional strong tornadoes from cold-front interactions with warm Atlantic air. Rating is inconsistent; strongest documented was F4 in 2009 in Santa Catarina.
Pre-monsoon tornadoes across northeast India and Bangladesh. Reports are sparse but 1996 Bangladesh-India border tornado killed ~700, second-deadliest tornado in world history.
Highveld tornadoes on the interior plateau. Rare but occasional strong ones — 1998 Umtata F4 killed 24, 2011 Duduza F2 killed 3.
Three ingredients rarely all show up together: warm humid air from a nearby ocean, cold dry air from a high-latitude source, and elevated dry air from a desert or plateau — all colliding over flat terrain. The US Great Plains is essentially the world's only landscape where those three currents converge routinely with nothing to block them.
Argentina, southeast Australia, and northeast India-Bangladesh have partial versions of this geometry, which is why they see the next highest counts. Everywhere else lacks the fourth ingredient — flat interior terrain — and gets fewer, weaker events.