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The 2021 Los Angeles Mega-Tsunami was the worst natural disaster in the history of the United States. Triggered by a massive unknown underwater volcano near Hawaii, the tsunami was eighty feet in height upon making landfall in southwestern California on April 1, 2021. Catastrophic destruction and flooding resulted, with nearly ninety-five percent of downtown Los Angeles was somehow affected, with surrounding communities suffering similar fates, though some were to a lesser degree.

Background

Preparations

Impact

Aftermath

Records