This chapter offers an overview of the published evidence of the impact of an extreme flood event on the port of the Tartessian city of Huelva at the beginning of the 6th century BC. A review of the urban development of the emporium’s port area in the central decades of the 6th century BC suggests that this episode marked the beginning of a phase of building recovery and the implementation of construction strategies aimed at mitigating flood risk. This, in turn, allows us to re-establish the commercial and economic boom of Huelva in the central decades of the 6th century BC in a scenario of adaptation and resilience in the wake of a catastrophic natural event.