Update: Apple has reported that all problems are now resolved with outages having lasted from 5:35 p.m. to 6:49 p.m.:
Apple’s system status page is showing that some users are experiencing problems with iCloud and may not be able to access a number of services, including: Mail, Contacts, Photo Stream, Calendar, Reminders, Backup, and more. iMessage and other services, such as the App Store and iTunes, remain online. Apple’s recently updated system status page shows that the outages started happening around 5:30 p.m. EST.
Late last week Apple confirmed and quickly fixed issues that some users were having with being unable to access iCloud documents, Photo Stream, back up and restore, and iMessage. We’ll keep you posted.