In the present study, multiple TC events are defined as tropical cyclogenesis events occurring in the presence of at least one preexisting TC, while non-multiple TC events are defined as TC genesis events occurring in the absence of preexisting TCs. The analysis reveals that multiple TC events constitute a substantial fraction of all TC genesis events in the NATL (24%), EPAC (45%), and WPAC (33%). Moreover, a substantial fraction of preexisting TCs in the NATL (30%), EPAC (40%), and WPAC (23%) are clustered 10003000 km west of the TC genesis event during multiple TC events. Reanalysis-based composites suggest that the large-scale environment of EPAC multiple TC events is characterized by the eastward propagation into the EPAC of basin-scale enhanced convection and near-equatorial lower-and-upper-tropospheric zonal wind anomalies associated with the MaddenJulian Oscillation (MJO). These results together with the absence of significant large-scale environmental anomalies in the EPAC non-multiple TC events composites suggest that the MJO may be important in creating a favorable environment over a sufficiently large area for multiple TCs to simultaneously exist. In their totality, these results suggest remarkable similarity in multiple TC event characteristics among basins, while suggesting that multiple TC events may be predictable weeks ahead of time due to potential importance of the MJO during these events.