Tsawar asthma shine haifar da harin asma ta yanayin muhalli wanda hadari na gida ya haifar kai tsaye. An ba da shawarar cewa a lokacin tsawa, ƙwayar pollen na iya ɗaukar danshi sannan kuma ya fashe cikin ɓangarorin da yawa tare da waɗannan guntuwar da iska ke watsawa cikin sauƙi. Yayin da mafi yawan hatsin pollen yawanci gashi a cikin hanci ke tace su, ƙananan guntun pollen suna iya wucewa su shiga cikin huhu, suna haifar da harin asma. An dai yi taho-mu-gama da tsawa ta haifar da kai hare-haren asma a garuruwan da jami'an agajin gaggawa da asibitoci suka mamaye. An gane abin da ya faru na wani lokaci mai mahimmanci tare da nazarin wani taron a Birmingham, Ingila, lura da alaƙa tsakanin tsawa da kuma asibitoci. Wannan gaskiyar cewa waɗannan ba ware abubuwan da suka faru ba kuma sun kasance wani ɓangare na tsarin abubuwan da ke gudana ana rubuce a fili a cikin bita na "Thunderstorm asthma, bayyani na tushen shaida". Muhimmiyar ƙarfafawa a cikin nazarin abin da ya faru ya faru ne bayan wani abu a cikin shekarata 2016 a Melbourne, Ostiraliya.