A heavy thunderstorm activate an unbelievable serial publication of case in Australia in the first place this week , resulting in widespread reports of asthma attacks , overflow hospitals , and the death of at least four multitude .

The thunderstorm pick out place on Monday November 21 over Melbourne , Australia ’s secondly - heavy metropolis . The gruelling rain is believed to have soaked rye forage pollen , induce them to burst , spreading midget specks of pollen across the city . The little pieces of pollen then made their way into the respiratory parcel of land of the local people and call forth asthma attack , along with other ventilation difficulties .

" When rye grass pollen becomes wet through humidity or pee , it breaks up into a lot of small pieces and those small pieces can get past the nasal enactment into the lungs . commonly rye skunk would be snare in the nasal enactment , " Robin Ould , from the Asthma Foundation of Victoria in Australia toldAFP .

" When it gets into the lungs , the allergen that are there cause an asthma attack attack … the minor bronchial tubes become inflamed , they fill with mucous secretion and the muscularity around them become tight and people ca n’t exchange their air , " he explain .

As unhinged as it seems , “ electric storm bronchial asthma ” is a phenomenon document in a handful ofscientific survey . Although it is rare , Melbourne has had at least three other instances of them in the preceding few decade due to the gamy sum of money of rye locoweed ground in the farmlands smother thecity . The phenomenon has also been seen before in the UK , in bothLondon and Birminghamin 1994 and 1983 , respectively .

The pinch services received 1,900 emergency phone margin call within five hours on Monday evening , with some 8,500 patients heading to hospitals over the surveil two days . Four people die and , as of today , three patients remain in a critical circumstance , with nine more in intensive care . The legal age of those affected had a story of asthma or hayfever .

“ This was a wellness pinch of an unprecedented scale … It was like having 150 bomb going off mightily across a finicky part of metropolitan Melbourne , " Victorian state of matter Health Minister Jill Hennessysaid .