If a homeowner reports that water is running into their section, one solution may be to add joint seal.
There are two different types of joint seal: foam tape and plastic extrusions; dependent on the door type.
Clopay always recommends any joint seal that is being added to an already installed door needs to be installed by a professional door installer.
See attached Tech's Corner newsletter, which describes what joint seal options are available based on the door type. for 2" EPS doors using a plastic extrusion joint seal, there are also installation instructions attached.