| Event Category | Disaster |
| Event Group | Natural |
| Event Subgroup | Meteorological - Hydrological |
| Event Type | Storms and Severe Thunderstorms |
| Place | St. Lawrence River |
| Event Start Date | June 26, 1930 |
| Event End Date | June 26, 1930 |
| Comments | St. Lawrence River, June 26, 1930. Lightning struck the bow of the "John B. King" drillship in the St. Lawrence River, igniting a store of dynamite aboard. The explosion killed 30 people and injured 11 others. |
| Fatalities | 30 |
| Injured / Infected | 11 |
| Evacuated | 0 |
| Estimated Total Cost | Unknown |
| Federal DFAA Payments | Unknown |
| Provincial DFAA Payments | Unknown |
| Provincial Department Payments | Unknown |
| Municipal Costs | Unknown |
| OGD Costs | Unknown |
| Insurance Payments | Unknown |
| NGO Payments | Unknown |
| Utility - People Affected | 0 |
| Magnitude | 0.0 |