Haɗuwa da iskar iskar kudu maso gabas da iskar arewa maso yamma suna haifar da lokacin ruwan sama mai zafi (Nuwamba-Afrilu) tare da hadari mai lalacewa akai-akai, da kuma lokacin bushewa mai sanyi (Mayu-Oktoba). Ruwan sama da ke fitowa daga Tekun Indiya suna zubar da yawancin danshi a gabar gabashin tsibirin; ruwan sama mai yawa yana tallafawa yanayin yanayin gandun daji na yankin. Tsakiyar tsakiyar tsaunuka sun bushe da sanyi yayin da yammacin ya fi sanyi, kuma yanayin semi-arid yana da rinjaye a cikin kudu maso yamma da kudancin tsibirin. Guguwar wurare masu zafi suna haifar da lalacewar kayan more rayuwa da tattalin arzikin gida da asarar rayuka. A cikin 2004, Guguwar Gafilo ta zama mafi girman guguwar da aka taɓa yin rikodin Madagascar.
wani lokacin bushewa mai sanyi