A number of iCloud services are currently experiencing downtime in the United States, Canada and other countries, an issue that became widespread within the past hour or so. A significant number of users have tipped MacRumors and posted on Twitter and other social media platforms about being unable to sign into iCloud or access related services such as Mail and Find My iPhone.
Apple services have experienced multiple instances of downtime in recent months, including a prolonged App Store and iTunes outage in early March, and subsequent downtime in late March, followed by a TestFlight outage for developers in May. Apple has historically been rather slow at updating it system status page to reflect any ongoing issues, usually doing so several minutes after issues begin.
Update 9:09 AM Pacific: iCloud services have been restored for some users.