Salesforce has shared the following update:
"The Technology team is confident that this incident was the result of an internal DNS change. We are starting to get reports that some customers are able to access their Salesforce services, and we continue to closely monitor that aspect of the recovery."
We are also seeing that customers are starting to be able to login again. We are still closely monitoring this situation. Please try logging in and reach out to email@example.com
if you are still running into errors.