Some 100,000 people marched to protest against the authorities' handling of Spain's floods in Valencia, whose eastern region bore the brunt of the tragedy's 230 deaths.

Spain is racing to reconstruct areas devastated by deadly floods last month but experts have urged a rethink of development with the relocation of buildings away from vulnerable areas.But Romero Aloy said there has to be a "rethinking the territorial model and considering removing buildings or installations that face a high risk" of flooding.

Spanish Prime Minister Pedro Sanchez on Wednesday announced 2.3 billion euros ($2.42 billion) in additional aid to reconstruct areas of the Valencia region hit by the deadliest flash floods in Spain's modern history.

Tens of thousands poured onto the streets of the Spanish city of Valencia Saturday evening to protest the government's handling of last month’s deadly floods.

Adam Parsons reports from an underground car park in Valencia, that is "full of mud and abandoned cars", following the severe floods that hit the region.

Spanish Prime Minister Pedro Sanchez on Wednesday announced 2.3 billion euros ($2.42 billion) in additional aid to reconstruct Valencia area after the deadliest flash floods in Spain's modern history.

Angry residents protested and lit candles in memory of victims on Friday as Spain marked one month since its worst floods in a generation killed 230 people. Outrage swept the country after the October 29 catastrophe wrecked homes and businesses leaving thousands of cars piled up in muddy streets in the eastern Valencia region.