Haze Day Who counts as vulnerable in haze?
NEA's guidance singles out the elderly, pregnant women, children, and people with chronic lung disease or heart disease. They should avoid strenuous activity from Band 2 (above 55 µg/m³).
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Why they are more at risk
Their lungs or hearts are more easily strained by fine particles, so NEA advises earlier and stricter limits than for healthy adults.
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Sources
- NEA 1-hour PM2.5 readings (Singapore) — National Environment Agency (NEA), Singapore · official site · API / docs
- NEA 24-hour PSI (Singapore) — National Environment Agency (NEA), Singapore · official site · API / docs