Chapter - Rainstorm
Rainstorm is a scene. "Rain starts to come down, pattering on the desert sand. Soon it's gonna be a muddy deathtrap out here."
Rainstorm begins when Rabbit's Offer ends.
The rain is a backdrop. "Rain batters down on the desert."
When Rainstorm begins: now the rain is in Around the Tower.
Rainstorm ends when at least one thing required by a plan has been carried and Control Center is visited and location is not Roof and a random chance of 1 in 4 succeeds.
Every turn when a random chance of 1 in 3 succeeds and player is in Office Interior during Rainstorm: say "[one of]The building groans as wind and rain lash it from outside[or]Water from the storm trickles down from unseen cracks and holes[or]Rain beats constantly on the roof, loud and furious[in random order]." [Just adding a bit more ambience during the rainstorm.]
When Rainstorm ends: now the rain is off-stage; say "The rain's dying down, the sounds of the storm fading, water sinking into the thirsty sand leaving only the smell of [sage] behind."; now sage is in Around the Tower.
The sage is a backdrop. Instead of smelling location when sage is visible, try smelling sage. Instead of smelling sage: say "When you were a kid, it smelt like camping and adventure. Now it just smells like desert and confusion.".
Instead of going to The Open Desert during Rainstorm: say "That's not the best idea in a storm like this."
Instead of listening during Rainstorm: say "You can't hear anything at all above the pounding noise of water slapping sand."
Report going from Crumbling Concrete to Staging Area during Rainstorm: say "Gratefully, you slip inside the building, out of the storm."