Thunderstorm asthma can be brought on by pollen even in those who don’t normally suffer from asthma.

The icebergs have melted and climate change is to blame for the flooding
and landslides. It can also raise pollen levels, extend the pollen season,
and exacerbate health issues associated with pollen.
One in five persons suffer from “hay fever” (allergic rhinitis) every year
because pollen grains irritate the mucous membranes in their nose and eyes.
When this happens, it’s common to experience a stuffy or runny nose and
irritated eyes.
Asthmatics are more likely to experience an attack during peak pollen times.
People who have not been diagnosed with asthma or hay fever can nonetheless
experience symptoms of thunderstorm asthma when exposed to pollen.