"7:42 AM PST We are investigating Internet connectivity issues to the US-WEST-2 Region."

https://status.aws.amazon.com/

Edit: They added US-WEST-1:

"7:52 AM PST We are investigating Internet connectivity issues to the US-WEST-1 Region."

Edit: Found root case, maybe?

"8:01 AM PST We have identified the root cause of the Internet connectivity to the US-WEST-1 Region and have taken steps to restore connectivity. We have seen some improvement to Internet connectivity in the last few minutes but continue to work towards full recovery."

"8:01 AM PST We have identified the root cause of the Internet connectivity to the US-WEST-2 Region and have taken steps to restore connectivity. We have seen some improvement to Internet connectivity in the last few minutes but continue to work towards full recovery."