DUBAI, United Arab Emirates  On the surface, this glittering Arabian boomtown seems immune to the financial crisis plaguing the global economy.

The skyline still bristles with cranes  an estimated 20 percent of the world’s total  and the papers are full of ads promoting spectacular new building projects. On Sept. 24, tourists from around the world flocked to the opening of Atlantis, a gargantuan, pink, $1.5 billion resort hotel built on an artificial, palm-shaped island. There was no shortage of people willing to pay as much as $25,000 a night for a room, to gaze at the sharks and rays in a vast glass-lined aquarium in the lobby and to dine at marquee restaurants like Nobu and Brasserie Rostang.

But as recession looms in the West, cracks are appearing in the oil-fueled boom that has made Dubai, with its futuristic skyscrapers on the turquoise waters of the Persian Gulf, a global byword for unfettered growth.

Banks are reining in lending, casting a pall over corporate finance and building plans. Oil prices have been dropping. Stock markets across the region have been falling since June. After insisting for days that the oil-rich Persian Gulf region was fully “insulated” from financial troubles abroad, the Emirates’ Central Bank made about $13.6 billion available on Sept. 22 to ease credit problems, in an echo of bailout measures in the United States. Already, some bankers are saying it is not enough.