Tornadoes in South Africa?

This weekend two tornadoes hit Gauteng (Duduza on the East Rand) and the Free State (Ficksburg near Bloemfontein). Apparently this is not unusual for this time of year with the high winds and hot weather. It is caused by a low pressure system called mesocyclones which can cause severe storms and thus tornadoes. I thought SA would be exempt from such crazy storms, obvules not! Sites say that the tornado that hit Duduza was a F4. This means that winds reach between 333 - 418 km per hour causing "Devastating damage: Houses and other small structures can be razed entirely; automobiles are propelled through the air" - HowStuffWorks

This is a video of the tornado that hit Duduza