SINGAPORE - It was a very wet Father's Day for some diners at Tenryu Restaurant on Sunday (June 18) evening as flash floods submerged the restaurant in knee-high water.

"It's the worst case," said Mr Khoo Keat Hwee, 30, the owner of the Japanese restaurant on Dairy Farm Road. "In the two years we were here, we've had two other floods, but the water at those times was only ankle-deep."

He added that he and his staff spent about four hours cleaning up after the flood, which left debris strewn across the outdoor seating area as well as inside his restaurant.

The restaurant posted a video of flooding on Facebook together with an apology to customers.

The situation was made even more disappointing as he had received almost 50 bookings that night by patrons hoping to celebrate Father's Day at the eatery.

"We called customers to tell them not to come and to say we were really sorry,"Mr Khoo said. "I was actually bringing in my friends when my guys called me and I had to turn them away."

Still, there were about 30 to 40 customers who stayed to eat at the restaurant even though they ended up having to remain standing to eat.

"We offered them discounts, but they refused to take it," said Mr Khoo.