Resolution criteria: - "Yes": Wins if at least one major thunderstorm is officially recorded or reported by the Meteorological Service Singapore (MSS) over Singapore strictly after 2026-10-04T16:00:00Z and at or before 2026-10-11T16:00:00Z. - "No": Wins if no major thunderstorm is officially recorded or reported by MSS over Singapore during that same interval. Clarifications: - A "major thunderstorm" is defined as a severe thunderstorm event recorded or announced by MSS, characterised by at least one of the following: a Heavy Rain Warning issued by MSS, lightning activity recorded island-wide, or wind gusts associated with a thunderstorm squall reported at any MSS weather station during the window. - The qualifying interval is strictly after 2026-10-04T16:00:00Z and at or before 2026-10-11T16:00:00Z (UTC). Both the MSS Historical Daily Records and any MSS weather warnings or advisories published for this period serve as the primary evidence.