Say this

  1. Drink water every hour, even when you are not thirsty. When the WBGT reaches 31°C, MOM requires at least hourly drinks and recommends 300 ml an hour or more for hard work (MOM heat stress measures).
  2. Cool water must be close to where you work. If a water point is empty or warm, tell me straight away.
  3. Bring your own bottle and fill it at every break. Sweet drinks and energy drinks do not replace water.
  4. At 32°C WBGT, heavy work stops for at least 10 minutes every hour. At 33°C it is at least 15 minutes. These are MOM requirements, not favours.
  5. Take your break in the shade or the rest shelter. A break in the sun does not cool you down.
  6. Check your urine colour. Dark yellow means you need more water now.
  7. If you feel dizzy, sick or have a headache, stop and tell me. Nobody gets marked down for resting.

Ask the crew

  1. How often should you drink water today?
  2. Where is the nearest cool water point to where you work?
  3. What is the minimum break at 32°C WBGT for heavy work?
  4. What does dark urine tell you?

Show them

  • The water points and where spare cups or refills are kept.
  • The shaded rest area and the WBGT reading board.
  • The urine colour chart in the toilets.

Sign-off

Site: ______________________   Date: ____________   Briefed by: ______________________

NameCompanySignature

Sources

  1. Heat stress measures for outdoor work, Ministry of Manpower.

This is practical guidance, not legal advice. Laws and codes of practice change; always check the current official text and your site's own procedures.

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