The High-Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory is designed to
record air showers produced by cosmic rays and gamma rays between 100 GeV and
100 TeV. Because of its large field of view and high livetime, HAWC is
well-suited to measure gamma rays from extended sources, diffuse emission, and
transient sources. We describe the sensitivity of HAWC to emission from the
extended Cygnus region as well as other types of galactic diffuse emission;
searches for flares from gamma-ray bursts and active galactic nuclei; and the
first measurement of the Crab Nebula with HAWC-30.