The shopping centre's 1,800 underground parking spaces quickly filled with water and mud last week, when the southern outskirts of Valencia were hit by a tsunami-like flood.
Equipped with a small boat, floodlights and four pumps, rescue workers navigated through vehicles drowned under more than a metre of muddy water.
Despite the intensive efforts, no bodies have been found as of yet.
Storms in eastern Spain led to massive flooding last week, killing more than 200 people mostly near Valencia.
The death toll is expected to increase as more underground car parks in the region are getting cleared out.
