What the release reports
Immediate measures announced in October 2023 require hourly WBGT monitoring, regular hydration and shaded breaks. New or returning workers should build heat exposure over at least seven days.
Details and conditions
At WBGT 32°C or above, heavy physical work needs at least ten minutes’ rest hourly. Onsite meters become required from January 2024 for construction worth at least S$5 million, shipyards and process industry; others may use myENV.
Context and follow-up
The annex recommends longer rest at greater heat, buddy monitoring, rescheduling and emergency cooling. Its example table distinguishes light and heavy activity. Later revisions should be consulted for subsequent changes, rather than applying this historical announcement as the entire present framework.
Annex hourly rest examples
| WBGT | Light work | Heavy work |
|---|---|---|
| 32–below 33°C | 5–10 minutes | 10 minutes |
| 33°C or more | 10 minutes | 15 minutes |
The 2023 minimum mandatory rule was ten minutes for heavy work at 32°C or more; the annex recommends longer rests.
Official source
This report is independently written from the MOM release dated above. Case status, policy announcements and historical figures refer to that release.
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