Flooding in Mexico

General view of Villahermosa and the flooded streets and houses Photograph: America Rocio/AP

Members of the Mexican army build a retention dyke on the shore of the Grijalva river Photograph: Jaime Avalos/EPA

Mexican army soldiers build a dam of sandbags at the edge of the river Photograph: America Rocio/AP

A man carrying his child through flooded streets Photograph: Jaime Avalos/EPA

A pre-Colombian era Olmec head is seen partially underwater and surrounded by sandbags due to heavy floods Photograph: America Rocio/AP

A man pushes his children in a boat through a flooded street after the Carrizales river overflowed Photograph: Gilberto Villasana/AFP

Mexican army soldiers helping to evacuate people who are up to their necks in rising floodwaters Photograph: Marco Ugarte/AP

People help an elderly woman from a flooded area Photograph: Marco Ugarte/AP

The Mexican navy rescues residents Photograph: Gilberto Villasana/AFP

A man walks through the flooded streets with his cat Photograph: Jaime Avalos/EPA

Mexican navy officials help residents to board a helicopter on the roof of a school Photograph: Gilberto Villasana/AFP

A child is helped on to a helicopter Photograph: Gilberto Villasana/AFP

The Mexican president, Felipe Calderon, visits residents of Villahermosa who were evacuated to a temporary shelter in a convention centre Photograph: Alfredo Guerrero/AFP