The host is upgrading his hardware/systems, and the server network will be offline for 2 hours.
Below is a summary of the message from the host.
"In order to continue providing the best service to you and your fellow customers, we're scheduling a maintenance to upgrade the equipment for the MySQL server, and some miscellaneous changes, which are listed below.
This maintenance is expected to take no longer than 2 hours, meaning all services will be unavailable for up to 2 hours."