| Event Category | Disaster |
| Event Group | Natural |
| Event Subgroup | Meteorological - Hydrological |
| Event Type | Storms and Severe Thunderstorms |
| Place | Calgary AB |
| Event Start Date | September 7, 1991 |
| Event End Date | September 7, 1991 |
| Comments | Calgary AB, September 7, 1991 (Labour Day). 30 minute thunderstorm. Downpours of rain and golfball-sized hail flooded basements and caused property damage; hail smashed windows. Birds crushed by hail; cars trapped in downtown underpasses. 15 manhole covers blown off, 28 catch basins needed to be unplugged. |
| Fatalities | 0 |
| Injured / Infected | 0 |
| Evacuated | 0 |
| Estimated Total Cost | $884,595,372 |
| Federal DFAA Payments | Unknown |
| Provincial DFAA Payments | Unknown |
| Provincial Department Payments | $9,289,467 |
| Municipal Costs | $496,865,521 |
| OGD Costs | Unknown |
| Insurance Payments | $378,440,384 |
| NGO Payments | Unknown |
| Utility - People Affected | 0 |
| Magnitude | 0.0 |