Department of Labor and Employment (DOLE) Labor Advisory No. 20, Series of 2026, titled Guidelines on the Prevention and Management of Heat Stress During El Niño and Other Periods of Extreme Heat, establishes the compliance framework for protecting workers in the Philippines from occupational heat hazards. Issued on October 27, 2026, by Labor Secretary Francis N. Tolentino pursuant to Article 5 of the Labor Code of the Philippines, as renumbered, and Section 25 of Republic Act No. 11058, the advisory responds directly to PAGASA climate models and expert evaluations indicating that El Niño conditions will intensify between the September–December 2026 season and persist through the first half of 2027.
Under this issuance, private-sector employers must integrate forward-looking climate monitoring and site-specific thermal measurements into their Hazard Identification, Risk Assessment, and Control (HIRAC) processes, execute tiered safety interventions mapped to four PAGASA Heat Index categories (ranging from 27°C to 52°C and above), maintain resilient welfare facilities, and report severe heat-related incidents to DOLE within 24 hours.
Scope and Legal Coverage: Private vs. Public Sector
Section 1 of Labor Advisory No. 20, Series of 2026 mandates coverage across all employers and workers in the private sector, encompassing all establishments, projects, sites, and undertakings where personnel face actual or foreseeable occupational heat stress. Rather than limiting its scope to ambient air temperature alone, the advisory explicitly covers secondary workplace hazards aggravated by El Niño conditions, including water shortages, reduced ventilation or cooling capacity, power interruptions, degraded air quality, and operational disruptions across both indoor and outdoor workplaces.
Public-sector agencies and government personnel are governed separately under existing inter-agency policies. Specifically, public-sector workplaces must adhere to CSC-DOH-DOLE Joint Memorandum Circular No. 1, Series of 2020 on the Occupational Safety and Health Standards for the Public Sector, alongside DOH-DOLE-CSC Joint Administrative Order No. 2023-0001 on the National Policy Framework on the Promotion of Healthy Workplaces.
Conducting Hazard Identification, Risk Assessment, and Control (HIRAC)
Section 2 requires employers, acting through their Occupational Safety and Health (OSH) personnel and committees and in consultation with workers and their representatives, to conduct and document a comprehensive HIRAC tailored to occupational heat stress and El Niño impacts. A compliant assessment must evaluate three core operational dimensions:
Thermal and Environmental Factors: Environmental heat, relative humidity, radiant and solar heat loads, and dust or smoke exposure.
Task and Worker Factors: Work intensity, duration of exposure, worker acclimatization status, clothing and personal protective equipment (PPE) thermal burden, and individual worker susceptibility.
Infrastructure and Resource Resilience: Water availability, ventilation and cooling system reliability, potential power interruptions, transportation disruptions, access to essential services, and emergency medical access.
To establish forward-looking heat-risk and El Niño monitoring, employers must combine official government weather data with onsite workplace observations and measurements. Specifically, employers are required to track PAGASA El Niño advisories, seasonal climate outlooks, Heat Index information, Observed Heat Index data from PAGASA Automatic Weather Stations, and the five-day iHeatMAP Heat Index forecast (https://www.pagasa.dost.gov.ph/weather/heat-index), alongside location-specific hourly heat index forecasts from http://panahon.gov.ph.
Crucially, general atmospheric forecasts cannot substitute for workplace-specific assessments, direct worker observation, or feasible engineering controls. Employers must validate official forecasts against actual onsite thermal measurements and update their HIRAC periodically. Mandatory HIRAC reviews are triggered whenever PAGASA issues a material El Niño or heat advisory, seasonal or workplace thermal conditions shift, utilities (water, electricity, ventilation, or cooling) become unreliable, work processes, schedules, staffing, or PPE change, or monitoring, worker reports, and incidents indicate that existing controls may be inadequate.
Mandatory Control Measures by PAGASA Heat Index Category
Section 3 directs employers to implement heat-stress controls following the hierarchy of controls, grounded in official forecast information, site-specific HIRAC findings, actual workplace temperature measurements, and observed worker responses. Whenever official forecasts, workplace conditions, or worker responses indicate a higher level of risk, employers are required to apply the more protective control measure.
PAGASA Heat Index Tier | Temperature Range | Primary Operational Focus | Mandatory Employer Control Measures |
|---|---|---|---|
Caution | 27°C–32°C | Baseline hydration, shade, and awareness | Continuous access to adequate safe and potable drinking water; shaded or ventilated rest areas; light-colored, loose-fitting, or breathable uniforms; hydration reminders; training on heat stress awareness, early symptoms, and first aid. |
Extreme Caution | 33°C–41°C | Active cooling, work-rest cycles, and peer monitoring | Mandatory structured rest-shift-hydration cycles; designated cool-down areas with active cooling (e.g., mechanical ventilation or air conditioning); peer-monitoring buddy system for early illness detection; appropriate PPE; reassigning high-exertion tasks to cooler ambient hours; immediate access to trained OSH first-aiders with rapid cooling packs. |
Danger | 42°C–51°C | Schedule modification and flexible work arrangements | Flexible work arrangements (with worker concurrence and subject to labor standards) such as adjusted or staggered schedules (e.g., avoiding outdoor work from 12:00 p.m. to 3:00 p.m.), transfer of work to cooler periods/locations, alternative workplace arrangements, or telecommuting where work permits; reduced work intensity and heat exposure for onsite staff; appropriate work-rest cycles, cool/shaded recovery areas, and frequent potable water access. |
Extreme Danger | 52°C and above | Operational suspension, modification, or minimum vital staffing | Immediate reassessment of affected work and suspension, relocation, rescheduling, or substantial modification of operations when risk cannot be adequately controlled or imminent danger exists; minimum workforce and enhanced controls for vital public utilities, health services, and emergency response. |
Operational Nuances in the Danger Category (42°C–51°C)
When workplace conditions or forecasts enter the Danger Category (42°C–51°C Heat Index), administrative schedule modifications require the concurrence of affected workers and must comply with prevailing labor standards. Flexible work arrangements—such as avoiding outdoor work schedules between 12:00 p.m. and 3:00 p.m., transferring duties to cooler periods or locations, adopting alternative workplace arrangements, or utilizing telecommuting where the nature of the work permits—must maintain the applicable total daily or weekly working hours unless otherwise authorized by law. Furthermore, schedule adjustments cannot be used as a substitute for necessary onsite workplace controls. Workers required to remain onsite or continue reporting for work must have their work intensity and thermal exposure reduced and be provided with appropriate work-rest cycles, cool or shaded recovery spaces, and frequent access to potable drinking water.
Operational Rules in the Extreme Danger Category (52°C and Above)
At a Heat Index of 52°C and above, employers must immediately reassess affected operations and suspend, relocate, reschedule, or substantially modify tasks whenever thermal risks cannot be adequately controlled or an imminent danger exists. Operational decisions must factor in site-specific HIRAC findings as well as relevant information or declarations issued by PAGASA, the National Disaster Risk Reduction and Management Council (NDRRMC), the Department of Health (DOH), the Department of Environment and Natural Resources (DENR), the Office of the President, and local government units (LGUs). Lawful and practicable alternative work arrangements may be adopted to protect personnel while maintaining essential operations.
Establishments engaged in public utilities, health services, emergency response, and other vital operations are permitted to maintain only the minimum workforce necessary for the safe continuity of essential services. For these essential personnel, employers must deploy enhanced controls, including shorter exposure periods, additional staffing or rotation, reliable hydration and cooling, standby first aid and emergency transport, and contingency measures for water or power interruptions. DOLE explicitly mandates that continuity of service shall not justify exposing workers to imminent danger.
Worker Responsibilities
Section 3 also establishes reciprocal duties for employees. Workers must comply with prescribed workplace heat safety measures, participate in heat-stress prevention and acclimatization activities (including pre-deployment orientations and toolbox meetings, as applicable), immediately report heat-stress symptoms or unsafe thermal conditions to supervisors or OSH personnel, and cooperate in the implementation of heat-mitigation controls.
Emergency Preparedness, Welfare Facilities, and Social Security
OSH Program Integration and Emergency Response
Under Section 4, establishments must formally integrate heat stress and El Niño contingencies into their overarching OSH Program, HIRAC documentation, emergency response plans, and business continuity arrangements. Workplace emergency procedures must cover the following mandatory elements:
Immediate removal of affected workers from heat exposure.
Administration of first aid and rapid cooling for suspected heat stroke.
Appropriate hydration, provided strictly when the worker is fully conscious and able to swallow.
Emergency communication, prompt medical referral, and transport to an appropriate medical facility.
Deployment of trained first-aid personnel alongside backup water and power arrangements.
Documentation and investigation of all heat-related incidents and near misses.
Welfare Facilities and Utility Contingencies
Section 5 requires employers to provide and maintain adequate, safe, sanitary, and accessible welfare facilities in compliance with Republic Act No. 11058, DOLE Department Order No. 252, Series of 2025, and other applicable OSH issuances. Based on HIRAC results, work intensity, workplace conditions, exposure duration, and El Niño supply constraints, establishments must guarantee reliable access to safe and adequate drinking water, washing facilities, and suitable rest and recovery areas that are adequately shaded, ventilated, or cooled as practicable. Employers must also establish backup contingency arrangements for water shortages and utility interruptions affecting ventilation, air conditioning, mechanical cooling, sanitation, first aid, communication, transportation, and other protective measures, while keeping first-aid, medical referral, and emergency transport arrangements readily available during working hours.
Social Security Coverage
Under Section 6, employers must ensure that all workers, regardless of the nature of their engagement, are enrolled in the Social Security System (SSS) and that their social security premiums are paid.
Capacity Building, Reporting, and Enforcement
Continuing Capacity Building
Section 7 directs employers to implement continuing capacity building for OSH personnel, supervisors, first-aiders, and workers covering occupational heat stress, El Niño-related workplace risks, HIRAC, preventive controls, emergency response, and business continuity. DOLE, through its Regional Offices and concerned bureaus and attached agencies, provides technical assistance, information, education, and regulatory guidance to support effective workplace implementation.
Medical Recording and the 24-Hour WAIR Rule
Section 8 establishes strict medical surveillance and regulatory reporting timelines for occupational heat illnesses. Employers must record all work-related heat illnesses—specifically including heat stroke, exhaustion, cramps, syncope, and severe dehydration—in their establishment medical logs and include these records in the Annual Medical Report (AMR). In cases of serious occupational incidents involving hospitalization, permanent disability, or death, the employer must submit a Work Accident/Illness Report (WAIR) to the concerned DOLE Regional Office within 24 hours from occurrence, conduct an immediate investigation, and implement corrective measures.
Dispute Resolution and Administrative Penalties
Under Section 9, workplace disputes relative to the interpretation and implementation of the OSH Program must first be resolved through the establishment's workplace labor and management committee. If the dispute remains unresolved internally, employers and workers may request assistance from the Regional Conciliation and Mediation Boards through conciliation-mediation. Violations of mandatory OSH standards and duly issued compliance orders subject the employer to administrative sanctions and penalties under Republic Act No. 11058, its Revised Implementing Rules and Regulations, and other applicable DOLE issuances.
Frequently Asked Questions on DOLE Labor Advisory No. 20, Series of 2026
When is an employer required to suspend or modify work due to extreme heat?
Under Section 3(d) of DOLE Labor Advisory No. 20, Series of 2026, when the Heat Index reaches the Extreme Danger Category (52°C and above), employers must immediately reassess affected work and suspend, relocate, reschedule, or substantially modify operations whenever the risk cannot be adequately controlled or an imminent danger exists. In the Danger Category (42°C–51°C), employers must implement flexible work arrangements—such as adjusted or staggered schedules, avoiding outdoor work between 12:00 p.m. and 3:00 p.m., or telecommuting where practicable—with the concurrence of affected workers.
Do flexible work arrangements for extreme heat reduce worker hours?
No. Section 3(c) stipulates that flexible work arrangements adopted during Danger Category conditions (42°C–51°C)—including adjusted or staggered schedules, transfer of work to cooler periods or locations, alternative workplace arrangements, or telecommuting—must be implemented with the concurrence of affected workers, remain subject to applicable labor standards, and maintain the applicable total working hours within the day or workweek unless otherwise authorized by law.
Can employers rely solely on general PAGASA city forecasts for OSH compliance?
No. Section 2 explicitly states that general atmospheric information shall not substitute for workplace-specific assessment, worker observation, or feasible engineering controls. Employers must validate official PAGASA and Panahon.gov.ph forecasts against actual onsite workplace measurements and conditions when conducting and updating their HIRAC.
How quickly must employers report a severe heat stroke incident to DOLE?
Under Section 8, if a serious occupational heat incident results in hospitalization, permanent disability, or death, the employer must submit a Work Accident/Illness Report (WAIR) to the concerned DOLE Regional Office within 24 hours from occurrence, conduct an immediate investigation, and implement corrective measures. All work-related heat illnesses—including heat stroke, exhaustion, cramps, syncope, and severe dehydration—must also be recorded in the establishment medical logs and included in the Annual Medical Report (AMR).