Near the end of *Season of Storms*, we are at the wedding reception on the terrace when the rats come. Coral warns:

> 
> A tremendous storm. The rats can sense it. And I can too.
> 
> 
> 

But in the chapter I don't see anything about why it occurred. It doesn't seem related to

> 
>  the murder of the king at his wedding, or the new king.
> 
> 
> 

Nor was it the vengeful fox-lady.

A friend suggested that it has something to do with the death of Ciri's parents, who apparently died at sea. Is there any support for this, perhaps in later books?

This doesn't seem like a natural phenomenon, especially given Geralt's frequent, foreboding comment: *"this is a season of storms."* Is there a curse or any artificial cause of the storm?

(I remember hearing someone warn "winter is coming" for a whole book. But in that world, abnormal cold weather foreshadows the rising power of a Night King.)