In Weyl semimetals globally robust electronic states exist, which are related to the topology of the electronic band structure, and therefore protected against local defects and impurities. This can lead to strong and unusual electron-electron correlations. The title compound WP2 is a Weyl semimetal candidate with an anomalously large mobility at low temperatures and a charge-carrier mean free path of ~0.5 mm, described by hydrodynamic behavior [1,2,3]. Our Raman scattering study on WP2 uncovers phonon anomalies as the system transitions from the ohmic, diffusive regime at high temperatures into the hydrodynamic regime at low temperatures. We also address electronic and fluctuation-based scattering signals and compare our study to related topological systems.