A physical climate storyline for the Hercules storm in Portugal: Extreme coastal flooding in southwestern Europe under a changing climate.

In the first days of 2014, exceptionally energetic swells associated to the Hercules storm (also known as "Christina") produced one of the most devastating coastal events in Portugal, establishing new records in long-term wave observations for the area. Between January 6th and 7th, extreme coastal flooding affected >30 municipalities along the Portuguese coastlines, with buoys measuring maximum individual wave heights and periods of 14.91 m and 28.