Cyclone Kenneth made landfall late Thursday in Cabo Delgado province, packing wind gusts of up to 220 kilometres per hour
Having led 6-3 at half-time, England fell a point behind in the second half before captain Farrell and winger May took the game away from the Boks
The Springboks clawed to a 13-12 half-time advantage and dominated a second half in which England rarely looked like scoring