The cause of the problem was not 'immediately' clear. [=is was not known right away]
They live in the house 'immediately' [='directly'] behind this one.
We need to leave 'immediately'. [='at once', 'right away']
(..) We're getting the latest details. This is just coming in. ...has called for a city-wide evacuation... ...you have to move out of the area immediately. Spider-Man appears to be heading towards Oscorp. ...and it's really not clear if he's gonna make it. ...saved my boy on the bridge. (..)2012 The Amazing Spider-Man