Expect continuous moisture migration through wall cavities for 24 to 72 hours after water damage
https://express-professional-colorado-springs.evergrovio.com/posts/sudden-discharge-versus-gradual-negligence-determines-mold-growth-after-water-damage
When drywall gets wet, drying typically takes 24 to 72 hours under ideal conditions, but the timeline depends on saturation depth, humidity, and active dehumidification