Reading about the thunderstorm story made me sneeze and cringe. Prayer and/or daily preventive medications could help. Some people do take antihistamines every day to prevent an asthmatic allergic reaction to things. That is probably the only way to try to make a human effort to prevent something unpredictable from occurring.
Not everyone who gets thunderstorm asthma has had it before. They have normally had severe pollen allergic rhinitis (hay fever) and most have been found to be allergic to ryegrass. Presumably the massive load of small allergenic particles being inhaled straight into the lung trigger these attacks. The best way to treat thunderstorm asthma is to prevent it occurring, where possible.
So good asthma control is essential.
There is no way that humans can control everything. Certainly, weather is one thing that humans cannot control. Thunderstorm asthma attacks are not very common, and people were taken by surprise. It's possible that we can develop better warning or recognition systems for when this happens in the future, but it's not possible to control mother nature.
The thunderstorm was a natural occurrence. It swept up pollen from the local plants and caused the allergies and asthma. Of course there could have been some type of warning for the people. Any kind of air quality warning could have been helpful. There isn't anything else that could be done though.