The tsunami is the catastrophic version of the wave — emotion at civilization-destroying scale, often following a distant unfelt earthquake. It appears in dreams during or before life upheavals whose emotional force could rewrite everything.
Positive Resonance
The high ground found, survival of the unsurvivable
Shadow Aspect
Total emotional catastrophe approaching, the warning siren
Nuances
Watching it approach: seeing overwhelm coming
Running for high ground: seeking elevation from feeling