Dubai airport had yet to resume normal operation after the storm flooded taxiways, forcing flight diversions, delays and cancellations.
Dubai Airports Chief Operating Officer Majed Al Joker told Al Arabiya TV he expected Dubai International Airport to reach 60-70% capacity by the end of Thursday and full operational capacity within 24 hours.
The airport struggled to get food to stranded passengers with nearby roads flooded and overcrowding limited access to those who had confirmed bookings.
The storm, which hit neighbouring Oman on Sunday, pounded the UAE on Tuesday, with 20 reported dead in Oman and one in the UAE.
While some roadways into hard-hit communities remain flooded, delivery services across Dubai, whose residents are used to ordering everything at the click of a mouse, slowly began returning to the streets.
Rains are rare in the UAE and elsewhere on the Arabian Peninsula, which is typically known for its dry desert climate. Summer air temperatures can soar above 50 degrees Celsius.
Following Tuesday’s events, questions were raised whether cloud seeding, a process that the UAE frequently conducts, could have caused the heavy rains.
But climate experts blame global warming for such extreme weather events.