[Taqwus]

Rain ups the fatigue, but doesn't otherwise restrict it.

Things that can fly during storm include but are not limited to --
* Air Elementals
* Queens of Elemental Air (duh!)
* Spring Hawks
* Storm Demons
* Caelian Storm Guard/Storm Generals
* Pazuzu, Lord of the Plague Wind
* Horrors

There is, if memory serves, no method of shutting down these flyers <i>en masse</i>... although maybe Darkness should for those without Darkvision.