Phakathi nenkathi eyomile, akukho mvula enetha endaweni. Umuntu ukhuluma kuphela ngenkathi eyomile lapho kwenzeka ngesikhathi esifanayo sonyaka njalo ngonyaka, ishintshana nenkathi yemvula. Izinkathi zonyaka ezomile zenzeka kuphela emgqeni nhlangothi zombili zenkabazwe. Enyakatho yeSahara, lesi siqeshana sibizwa ngokuthi indawo yaseSahel. Kodwa zikhona ezinye izindawo ezinjengalezi.
Uma inkathi eyomile inzima, imifula namachibi angoma ngokwengxenye noma ngokuphelele. Isigodi esinjalo sibizwa ngokuthi i-wadi. Bakhona e-Afrika, e-Asia naseNingizimu Melika, kodwa naseSpain nasesiqhingini saseCyprus saseMedithera. Izilwane ezikhethekile kuphela nezitshalo ezingasinda lapho. Kuyingozi futhi lapho: uma kukhona ukuduma kwezulu okunamandla emaphethelweni omfula, umfula ungakhukhula umfula ngokuzumayo. Izilwane nabantu bangathwalwa.
Kwezinye izindawo, kunamahlathi omile. Kunemvula eyanele cishe izinyanga eziyishumi ngonyaka ukuze kukhule amahlathi aluhlaza. Umhlaba ugcina amanzi amaningi. Phakathi nezinyanga ezimbili ezomile, izihlahla azifi, zivele zilahlekelwe amaqabunga. Lokhu kunikeza ukukhanya okuningi ezihlahleni. Azikho izinhlobo eziningi zezilwane nezitshalo lapha njengasehlathini elinemvula, kodwa kunezinhlobonhlobo ezikhethekile zezinhlobo.