- Heatwave records
- Four black rainstorm episodes (record-breaking heavy rainfall)
- Severe typhoons
- Coastal flooding
The Hong Kong Observatory uses a color-coded rainfall warning system, with “Black” being the most severe, indicating rainfall exceeding 70 mm per hour. Experiencing four such extreme episodes in a single month is a record-breaking and highly newsworthy event. This specific detail points to the correct answer, distinguishing it from more common heatwaves or typhoons.
