The Mexican civil defense authorities in the south-eastern Mexican state of Tabasco announced that 100,000 people were trapped overnight Friday by flooding in the provincial capital of Villahermosa.

Most residents in the flooded city had fled to the roofs or second storeys of their homes, awaiting evacuation by rescue workers.

More than 1 million people in Tabasco have suffered damage to their homes or been forced to flee amid statewide flooding. Many flood victims have lost everything they own.

Emergency teams were attempting to rescue families stranded on rooftops and providing them with emergency shelter.

Governor Andres Granier said 350,000 people are trapped in their homes and awaiting rescue - but only one death had been reported.

All crops had been destroyed, livestock had been killed and most of the state's business sectors had been affected, Granier added.

Mexican President Felipe Calderon toured the disaster area Friday and called for nationwide mobilization to provide relief to the people affected by floods. He called the Tabasco flooding one of the worst natural disasters Mexico had ever seen.