Ngo-Agasti, izinga lokukhula kweshishini lentsimbi elisezantsi liye lehla, lichaphazeleka kukukhula kwemveliso yentsimbi kunye nokuphuculwa korhwebo, amaxabiso entsimbi ehla inyanga nenyanga. Ukususela ngoSeptemba, njengoko ixabiso lepetroli eluhlaza linyuka, amaxabiso entsimbi ebuyele esiqhelweni, kulindeleke ukuba lifike emva kwexesha, kusaza kubonisa ukuthambekela okuncinci kokuguquguquka.