Diboson searches including HH in ATLAS and CMS in Run 2

Many models for physics beyond the Standard Model, such as an extended Higgs sector, Heavy Vector triplets ($W'$ and $Z'$), or exited states of of gravitons, predict a heavy resonance that decays to a pair of bosons ($W$, $Z$, $H$). Recent results for diboson resonance searches in a variety of final states from the ATLAS and CMS collaboration are presented, based on $\sqrt{s}$=13 TeV proton-proton collision data