The lives lost to the freak thunderstorm asthma outbreak in Melbourne has risen to nine with another death two months after the weather event.



The Department of Health on Wednesday released a statement advising the ninth person had died in connection to the November 21 storm, which saw 8500 Victorians suddenly in need of hospital care.

All other patients have since been discharged.

Fairfax Media understands the person died this week and had received specialist treatment in an intensive care unit before being moved to a ward.

On the high pollen count day in November hot winds carried grains across Melbourne followed by a sudden downpour that caused them to break into thousands of tiny allergen particles, which is believed to have triggered the unprecedented event.