People stand along the waterfront as a wave crashes onto a seawall durng the rising tide in Saint Malo, March 21, 2015. Parts of the French coast will be on alert for the so-called “tide of the century”, with tidal coefficients of 118 and 119 respectively on March 20 and 21. (Photo by Stephane Mahe/Reuters)

People look at the sea on the waterfront in Saint Malo, March 21, 2015. (Photo by Stephane Mahe/Reuters)

People dig for shellfish while another uses a metal-detector during a record low tide on Kerlaz beach near Douarnenez in western France, March 21, 2015. Parts of the French coast will be on alert for the so-called “tide of the century”, with a tidal coefficients of 119 out of a maximum of 120 today. (Photo by Mal Langsdon/Reuters)

A man digs for shellfish during a record low tide on Kerlaz beach near Douarnenez in western France, March 21, 2015. (Photo by Mal Langsdon/Reuters)

People dig for shellfish during a record low tide on Kerlaz beach near Douarnenez in western France, March 21, 2015. (Photo by Mal Langsdon/Reuters)

A man digs for shellfish during a record low tide on Kerlaz beach near Douarnenez in western France, March 21, 2015. (Photo by Mal Langsdon/Reuters)

A family digs for shellfish during a record low tide on Kerlaz beach near Douarnenez in western France, March 21, 2015. (Photo by Mal Langsdon/Reuters)

People cross the wet sand during a record low tide on Kerlaz beach near Douarnenez in western France, March 21, 2015. (Photo by Mal Langsdon/Reuters)

A woman digs for shellfish during a record low tide in Saint Malo, western France, March 21, 2015. Towns on France's North Atlantic coast braced for their first giant tide of the millennium on Saturday as the full moon and this week's solar eclipse combined to create an ocean surge not seen since 1997. (Photo by Stephane Mahe/Reuters)

A general view of people who dot the beach as they dig for shellfish during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

A woman displays shellfish found during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

A man digs for shellfish during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

A man digs for shellfish during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

A family walks on the beach as they dig for shellfish during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

A man carries tools to dig for shellfish during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

People dig for shellfish during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

People carry baskets after digging for shellfish during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

A general view of people who dot the beach as they dig for shellfish during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

A man carries a net with shellfish during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

A man displays a tool to measure the size of shellfish during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

A woman digs for shellfish during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

A general view of people who dot the beach as they dig for shellfish during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

A general view of people who dot the beach during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

A family poses for a souvenir picture during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

A man feeds a seagull during a record low tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

People sit on an embankment as the incoming high tide surrounds the Mont Saint-Michel 11th century abbey off France's Normandy coast March 21, 2015. At the Mont Saint-Michel, where some of the biggest tides in the world occur, visitors earlier gathered to watch the tide disappear out of sight, exposing areas of beach and rock visible only every 18 years. Towns on France's North Atlantic coast braced for their first giant tide of the millennium on Saturday as the full moon and this week's solar eclipse combined to create an ocean surge not seen since 1997. (Photo by Pascal Rossignol/Reuters)

People gather on the waterfront to watch the incoming high tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

People gather on the waterfront to watch the incoming high tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

A crowd of people is seen in silhouette on the waterfront as people watch the incoming high tide in Saint Malo, western France, March 21, 2015. (Photo by Stephane Mahe/Reuters)

A man stands on an embankment as the incoming high tide surrounds the Mont Saint-Michel 11th century abbey off France's Normandy coast March 21, 2015. (Photo by Pascal Rossignol/Reuters)