ArcGIS Server Feature Service Reader Timeout

I'm using an ArcGIS Server Feature Service Reader to read in flood hazard polygons but it keeps timing out, returning zero features. There are no errors or warnings in the log and the workspace keeps running after the reader times out. There are about 3 million features in the entire dataset (for the United States). I only need two states (New Mexico and Texas) but even clipping to a search envelope on the reader makes no difference. It's a publicly available service, no login required. What can I do to successfully read in the features from this service?