Teams had just five hours to get their designs into actual sand sculptures.
The judging of the sculptures was rated on originality of concept, artistic execution, technical difficulty, carving technique, and utilization of the site.
The AIA Sandcastle competition is a fundraising event for AIA Houston and ArCH Foundation.
On Sunday, visitors still had the chance to take a peek at the finished pieces before the rain came pouring in.
For more information, go to the AIA Houston website.