Inside the Houston Basketball Arena Where Fans Waited Out Storm Overnight

— -- Houston Rockets fans had an unexpected, and dangerous encounter after Monday night’s win against the Golden State Warriors when torrential rains caused flash flooding throughout the city.

"All towards the end of the game whenever there was a time out in the last few minutes in the fourth quarter, they made an announcement saying, ‘We strongly advise you to stay in your seats until after the weather passes,’" Narguess Arjomand told ABC News.

Between 6 and 10 inches of rain fell overnight in Houston, leading to major road closures and mass flooding throughout the city so the Toyota Center offered to allow the thousands of fans to wait out the storm inside because they would not be able to get home safely.

"You could even hear the thunder through the stadium," Arjomand said.

"When we were walking out we saw little kids already sleeping on their parents laps," she said.

Even though Arjomand decided to leave about a half hour after the game ended, fellow fan Lee Lonn was one of the ones who stayed until the bitter end.

"I was there till about 7 a.m.," Lonn told ABC News.

"I didn’t lay down. Some people were laying down on the marble floor and on the hard carpet," Lonn said. "I just kind of reclined on the stands on the lower level."

There was some fun at the beginning of the night, with Rockets center Dwight Howard talking to fans and signing autographs, but even he got upstaged. Howard’s young son got on the court and gave the fans a post-game show that they weren’t expecting.

"His kid was busting shots from half court," Lonn, a songwriter, said. "He was doing a cartwheel and an alley-oop."

Lonn said many parents were using recharge stations to make calls home to babysitters. Mitch Whitehead, a Texas A&M student who was at the game, said he and his friend saw people sneaking up to the luxury boxes, likely scoping out couches to turn into makeshift beds.

"It was kind of cool; you could see different parts of the stadium that you couldn’t see before, but we didn’t try anything crazy," Whitehead told ABC News.

"As the night kind of got longer and longer I’d say every hour they were kind of like moving us. They started pushing us to one of the sidelines so they could start cleaning and so, eventually, we were just in one section," Whitehead told ABC News.

When it came to food, some concession stands stayed open to serve popcorn, sodas and water, at regular stadium prices.

"It was highly expensive, $5 water bottles, $5 buckets of popcorn," Lonn said.

The staff did work much longer than normal to help out with the stranded fans, and Whitehead said they kept putting old promos and highlight reels on the overhead screenn in between flashes to the local news reports about the weather.

Lonn said staffers brought coffee and bagels for the last remaining fans who were still there by 6 a.m.

In the end, Lonn was happy with his decision to stay the night in the center even though his home is just a seven-minute drive away because his route was completely underwater. Arjomand and Whitehead, who left the stadium at around 2:40 a.m., both ended up staying in hotels along their route home. Whitehead and his friend ended up booking a room in a hotel just "a couple hundred yards" from the stadium.

"We definitely weren’t the only fans there either," he said.