A Disney ride can be "temporarily closed" for three primary reasons: unscheduled maintenance, weather safety, or planned refurbishment. During the day, most closures are "downtimes" caused by a sensor being tripped—Disney's safety systems are incredibly sensitive, and something as small as a dropped hat on the track or a guest standing up too early can trigger a total system e-stop. These typically last 15 to 45 minutes. Outdoor rides like Big Thunder Mountain or Expedition Everest close immediately if lightning is detected within a certain radius of the park. Finally, longer-term "refurbishments" are scheduled months in advance for major overhauls; for example, in early 2026, Big Thunder Mountain at Magic Kingdom is undergoing a massive spring renovation. It is a peer-to-peer best practice to use the My Disney Experience or Disneyland app to check "Live" wait times; if a ride says "Temporarily Closed," it usually means a technical glitch, and it’s often worth staying in the area to be first in line when it reopens.