Rails: Easy way to add more than one flash[:notice] at a time

I thought every time you do a flash[:notice]="Message" it would add it to the array which would then get displayed during the view but the following just keeps the last flash:

flash[:notice] = "Message 1"
flash[:notice] = "Message 2"

Now I realize it's just a simple hash with a key (I think :)) but is there a better way to do multiple flashes than the following:

flash[:notice] = "Message 1<br />"
flash[:notice] << "Message 2"