0.08% of the Gmail population doesn’t seem like much, but it’s an estimated 150,000 accounts. According to Google, that’s the amount of people affected by an “issue” in Gmail deleting stored content.
Essentially, some Gmail accounts have been emptied of all their messages, chats, etc. Google engineers have been working around the clock to sort the issue out. Some users have already had their content restored, and Google is confident a resolution will be available to all users “in the near future.”
If you happened to be one of the unlucky users with an empty inbox, you will not be able to sign in while Google works to restore your account. For updates on the situation, visit Google’s Apps Status Dashboard now.