Park View Shopping Centre in Whitley Bay was evacuated last Saturday after a car entering the first floor car park collided with a wall.
The impact ruptured the installed sprinkler system water supply and caused several thousand litres of water to enter the shopping mall.
It was safely evacuated and no injuries were reported during the incident.
Centre manager Trevor Gyllenspetz said: “The centre and car park re-opened on Sunday following a magnificent effort from all involved.
“Sincere thanks are extended to the emergency services for their help and support during the incident on Saturday morning and particular praise is extended to the Tyne and Wear Fire and Rescue Service for its additional hard work in helping to remove the water from the centre.
“Thanks are due to the facilities team and the tenants for their efforts in helping to get the centre ready to re-open so quickly.
“Our thanks also to the members of the public asked to evacuate the centre at the onset of the incident.
“Thankfully, there were no injuries caused by this incident and we hope to welcome the driver and passenger of the car again soon as customers to Park View.”
The shopping centre was bought in a £7.5million deal by Cordatus Property Trust, a venture between Cordatus Real Estate and CBRE Global Investment Partners, from Bow Street Mall two years ago.
Park View, which opened in 2003, provides 43,451sq ft of retail space with retailers including Sainsbury’s, Iceland, Boots, Home Bargains, Costa, Hays Travel, Peacocks, Timpson, Card Factory and Superdrug.