By surveying thousands of square degrees down to a depth of ~21 mag in g-band, LS4 is expected each year to discover around 20 tidal disruption events (TDEs) of stars by supermassive black holes. Surveying in multiple filters (g+i and i+z) will enable the selection of good candidates to follow up in real time with dedicated spectroscopic facilities in the Southern hemisphere. As well as providing an excellent data set for understanding TDE physics and enabling multi-wavelength follow-up, LS4 will also establish a baseline used to rule out prior AGN variability for some of the brighter TDEs that will be detected in future Rubin observations.