It happens from time to time, a few Apple services are down. As the page goes upsystem status, the concerns currently relate to a few important iCloud functions: contacts, calendar, mail, storage upgrades, bookmarks and tabs, as well as the keychain, iCloud Drive and Photos. In general, Apple doesn’t take too long to get its servers back on track.
Update 12:40 a.m. — The dashboard has been flashing green for a few minutes, so everything is back to normal!