It appears to be down, saying "Website temporarily unavailable". But it's intermittent for other employees at my company so it might be failing app services behind a load balancer.

CLI access or EC2 services doesn't appear to be affected, at least from us-east-1.

And, of course, the status health dashboard shows Green across the board. https://status.aws.amazon.com/

UPDATE

HatchedLake721 mentions that it appears to just be us-east-1 Web console that's down. Use this instead for now: https://us-west-2.console.aws.amazon.com/console/home?region=us-west-2

Thanks @HatchedLake721!