Storm Freddy kills over 300 in Malawi
Possibly, the Climate Change which has also caused marginal rise in sea surface temperatures fuel more energy into such storms, therefore making them more potent, stronger and with rapid intensification. Storm Freddy followed an unusual path, and had seven cycles of rapid intensification (this happens when storm adds wind speed of 35 miles in its strength in a period of 24 hours).
Source: skymetweather.com