The Bureau of Meteorology released a severe thunderstorm prediction on Thursday afternoon, with flash flooding, hail and high winds expected to rock the region. 

It followed a Murrumbidgee Local Health District issued warning about potential epidemics as a result of wild weather and comes amid thunderstorm asthma season.

Respiratory nurse consultant Robyn Paton said even if someone had not shown signs of asthma before, they could develop symptoms during a storm. 

She said pollen could be whipped up in the atmosphere, it could expand with rain and explode, breaking down into very fine proteins, which were small enough to enter the lungs and airways. 

“If people are out and about, I suggest they wear a lint-free mask of some kind,” Nurse Paton said. 

“For people who are already getting asthma, hay fever and sinus infections, it’s worse for them.”

Nurse Paton advised residents taking preventative medication to maintain their treatment. 

“They should always carry their reliever in case they get into strife,” she said. 

“If they find their difficulties don’t respond to treatment and get worse, they need to seek medical advice straight away.”

The thunderstorm asthma event in November last year was the largest event of its kind on record globally and contributed to ten deaths across Melbourne. The deaths are being investigated by the Coroners Court.