I quite like the temporal storms and their mechanics, but I have a few suggestions for improving the all round experience of them from a game play perspective
Give some way of telling when they are coming:
At the moment the only way you tell how long until the next storm is to run the /nexttempstorm command, which is a bit immersion breaking. My personal headcannon is that storms mess up the working of clocks (or clockwork items anyways) so by building one of these you can tell roughly how far away a storm is by how screwy it is acting. Im thinking 3 tiers, a crude one made from wood in the stone age, a metal one, and a precision one only createable by the clockmaker class. Easiest way to implement these would be to have the player click on them and it runs a script that looks at how long until the next storm, if its more then 24 or 72 in-game hours respectively for the crude and metal ones you get a vague message like "it doesn't look like a storm is close". For the curde one if you are under 24 hours, and for the metal one if you are under 72 hours, you get increasingly more accurate messages the closer until the storm hits ("There is a storm approaching" "You expect the storm to hit in the next day or so" "There is going to be a storm today" etc). The precision one just runs the /nexttempstorm command and gives you its output. Harder way to implement this would be to make these tick like an actual clock, with the tick increasing in intensity or starting to sound wrong as the storm approaches.
Build up
I feel like by creating some kind of "weather front" (https://en.wikipedia.org/wiki/Weather_front) not only would you give the player some more warning about when they are approaching, but it would also add to the amount of dread they inspire in players. From when the in game warning pops up (the one in the chat box that says "A <strength> temporal storm is approaching") you are considered in the front of the storm and a number of effect start happening around the player that increase in intensity up until the storm itself hits. These could be things like:
The gears that appear in the skybox start fading in over this time rather then just popping up out of nowhere when the storm hits
Your temporal gear indicator on the UI starts getting streaks of red rust on it
You get a really mild bending and warping effect, much less then during the storm itself but still noticable
The skybox starts "glitching" with the Rust World overlay flickering in and out
You can hear the mechanical sounds that normally emit from rifts faintly at all times, getting louder as the storm approaches