Due to the heavy snow, all buses have been cancelled until further notice.

If it weren`t for the heavy snow, you would notice how much further the bus had to go.

The buses would not have been cancelled if only it had not snowed so much.

Snow has caused the buses to stop running, though there will be an announcement of when they will start up again.

If this snow keeps up, there will be an announcement to declare that the buses will no longer run.