The Tower signifies a sudden, unexpected crisis. It tells of chaos, upheaval, disruption. Emotionally, the Tower suggests a crush to the ego, anger, lashing out, an outburst. It could mean a financial calamity that forces an abrupt change in lifestyle.
If anything good at all can be said about the Tower, it's that the catastrophe may bring a burst of insight and clarity. In cases of addiction, the Tower portends that "rock bottom" is coming, that moment of deepest despair which precedes a period of re-evaluation and possibly a new chapter.