These updates are undone in one transaction, and all files that are updated by the undo operation are saved, even if they are closed during the undo operation.
Officials are reinforcing levees in Illinois, Iowa, and Missouri to prevent further damage from river water that has already closed bridges and destroyed homes.
Icy roads created from storms this week paralyzed much of the greater Seattle, Washington area, where schools were closed and bus routes were suspended Friday as roads were too icy to navigate.
Any sudden shutdown in credit markets, of the sort that happened after the collapse of Lehman Brothers in September 2008, would have painful repercussions for Asia.