They finally posted to their status page about it: https://status.heroku.com/incidents/2451 https://status.heroku.com/incidents/2451 > Beginning at approximate

They finally posted to their status page about it: https://status.heroku.com/incidents/2451 https://status.heroku.com/incidents/2451 > Beginning at approximately 21:54 UTC Aug 15th, routing availability for US Common Runtime-hosted apps dropped below acceptable levels. Engineering was notified and immediately began scaling up capacity to address demand needs.