In comparison to other Walt Disney World parks, there aren't as many projects taking place in Hollywood Studios, while that is expected to change soon with today's news about the Studio Backlot Tour and other areas closing, as of today construction walls are confined solely to the Trolley Car Cafe Starbucks location coming to Hollywood Boulevard.
The Studio Backlot Tour was running today, but apparently not for long.
Over at Downtown Disney, rain washed out the crowds, but construction walls are all over the place. Construction is taking place throughout the Marketplace, Pleasure Island and West Side areas as can be seen in the photos below.
Lastly, over at the Polynesian Villages Resort, the right side of the lobby has been recently walled off in the last few days and a peak through the door in the last photo shows construction materials on site.