The West Bengal Action Plan on Heat Wave 2023, compiled jointly by the Department of Disaster Management & Civil Defence and WBSDMA per NDMA memo D.O. No. 1-17/2023-PP of 3 March 2023, states its own heat-wave definition rather than adopting IMD's departure bands: a grid-point maximum 3 C or more above normal for 3 or more consecutive days, and separately a maximum continuing above 45 C for two consecutive days. Its worker duties are to provide cool drinking water near the work place, caution workers against direct sunlight, schedule strenuous jobs to cooler times, increase the frequency and length of rest breaks for outdoor activities, and give additional attention to pregnant workers and those with a medical condition.
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This rule has no numeric trigger the calculator evaluates — it states duties and control measures rather than a threshold a reading can be checked against. Its measures are listed below.
No standalone formula is published for this standard; see programmable logic and parameters below.
| Parameter | Value |
|---|---|
departureAboveNormalC | 3 |
departureConsecutiveDays | 3 |
absoluteHeatWaveC | 45 |
absoluteConsecutiveDays | 2 |
avoidOutdoorWorkStartHour | 12 |
avoidOutdoorWorkEndHour | 15 |
West Bengal states its OWN definition rather than adopting IMD's departure bands, which is why these figures are stored here rather than drawn from FORMULAS.IMD_HEATWAVE_CRITERIA: 3 C or more above normal for 3 or more consecutive days, and separately above 45 C for 2 consecutive days. Only absoluteHeatWaveC is computed.
The departure criterion needs a station climatological normal this calculator has no input for, and both criteria are multi-day where the calculator evaluates a single reading -- so the engine reports that a day's temperature MEETS the absolute figure, never that a heat wave has been declared. The 12:00-15:00 window is advisory ('Avoid working outside between 12 noon and 3 p.m.'), not a ban.
Programmable logic
Flags whether the day's maximum reaches West Bengal's own absolute 45 C criterion and returns the plan's worker duties.
The 3 C-above-normal criterion is not computed: it needs a station climatological normal this calculator has no input for, and both of the plan's criteria are multi-day where this is a single reading, so atAbsoluteCriterion reports only that the day's temperature meets the absolute figure, not that a heat wave has been declared. Hidden when outdoorWorker is explicitly false.
Never produces work/rest minutes or stop-work.
Required inputs: maxTempC
Optional inputs: outdoorWorker
This standard was added to the calculator.
Get notified when West Bengal Action Plan on Heat Wave 2023 changes — threshold changes, scope and legal-status changes, additions and removals. Changes that permit more heat exposure than before are labelled as such.
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