Nobody's declared a haze crisis yet. But the ingredients are stacking up faster than usual, and that's worth watching before the sky turns grey, not after.
Malaysia's Southwest Monsoon has been blowing since 14 May and runs through September. Every year, this stretch brings drier air and fewer rain clouds — the exact conditions that let open burning get out of hand on both sides of the Strait of Malacca. This year, forecasters are watching it more closely than usual.
The dry season everyone recognises, plus an unwelcome guest
The Southwest Monsoon on its own isn't news. What's different in 2026 is who's showing up alongside it.
MetMalaysia said on 7 July that a "Super El Niño" is developing and could make conditions as hot and dry as 1998 by next year. Separately, the Singapore Institute of International Affairs' Haze Outlook 2026, released 24 June, put Malaysia, Indonesia, Brunei and Singapore on a "red" (high) risk rating for severe transboundary haze this year — its most serious tier. The report points to the returning El Niño, with NOAA estimating roughly a 63% chance it strengthens further, potentially compounded by a positive Indian Ocean Dipole. Historically, the worst haze episodes (1997–98, 2015, 2023) happened when both climate patterns lined up at once.
The outlook's own timeline flags August to September as the likely peak. That's still weeks away. But dry, hot ground doesn't wait for a calendar date to start burning.
On the ground, it's already stirring
This part isn't a forecast — it's already happening. Sarawak's Fire and Rescue Department (Bomba) reported 49 open-burning cases statewide since 1 July, with Kuching Division logging the most (15 cases) and Miri close behind (11). Cases spiked sharply between 10 and 12 July, and a lightning-triggered fire in Niah National Park has needed aerial water-bombing to control.
Bomba Sarawak director Jamri Masran said the numbers are "still under control," but the department is bracing for the Super El Niño conditions ahead and has told the public plainly to stop any open burning during the current hot, dry spell.
Meanwhile, strong westerly winds have moved through Sabah, Sarawak and the peninsula since early July — a pattern that carries smoke plumes rather than dispersing them. Independent real-time air trackers were already logging Kuala Lumpur's air quality dipping into the "unhealthy for sensitive groups" range in the past week. None of this is a full-blown haze event yet. It's the warm-up.
How to actually check the air before you plan your day
Skip the guesswork — Malaysia has a real system for this. The Department of Environment (DOE) runs the Air Pollutant Index Management System (APIMS) across 68 monitoring stations nationwide, updated hourly. The scale: 0–50 good, 51–100 moderate, 101–200 unhealthy, 201–300 very unhealthy, above 300 hazardous. Check it via the APIMS website or the MyJAS EQMS app before deciding whether that evening jog should happen as planned.
If your area's reading climbs past moderate, that's the cue to adjust plans — not panic, just be sensible about time spent outdoors.
Who needs to be more careful, and what health authorities actually say
The Ministry of Health's guidance is consistent on this: haze hits some people harder than others. According to MOH, the elderly, children, pregnant women in later stages, and people with chronic respiratory or heart conditions — asthma, chronic obstructive pulmonary disease, coronary artery disease — face a higher risk of their conditions worsening when air quality drops. Diabetics are also flagged as more vulnerable.
The general advice from Malaysian health authorities during haze episodes has stayed consistent for years: cut back on strenuous outdoor activity as the API rises, keep vulnerable groups indoors more, and if you need a mask outdoors when readings turn unhealthy, an N95 offers better protection than a surgical mask — though MOH notes N95s aren't recommended for young children or pregnant women. None of this requires a diagnosis or a special remedy. It's about reducing exposure when the numbers say to.
Haze isn't the only seasonal health pattern worth tracking in Malaysia right now — mosquito-borne illness follows its own separate rhythm, which we've covered in our piece on dengue cases in Malaysia if you want the fuller picture of what else is circulating this time of year.
FAQ
When does haze season actually start in Malaysia?
There's no fixed start date. Haze tends to follow the Southwest Monsoon's drier stretch, with risk historically rising from July and peaking around August–September when land and forest fires — mostly from open burning — are more likely to spread.
What does a "red" haze outlook actually mean?
It's a risk rating, not a guarantee. The SIIA's three-tier scale (green, amber, red) reflects how likely a severe transboundary haze event is, based on climate drivers like El Niño and the Indian Ocean Dipole. A red rating for 2026 means conditions resemble those before past major haze episodes — not that haze has definitely arrived.
How do I check the air quality index near me?
Use the DOE's APIMS portal or the MyJAS EQMS app for official, hourly readings from your nearest of 68 monitoring stations.
Who should be most careful when API readings climb?
Per MOH guidance, the elderly, young children, pregnant women in later stages, and anyone with asthma, COPD, heart disease or diabetes should be more cautious about outdoor exposure once readings move past moderate.
Does a hazy-looking sky always mean the air is unhealthy?
Not necessarily — humidity and cloud cover can make skies look grey without an unhealthy API reading, and the reverse can happen too. Checking the actual index beats checking the view outside your window.
Malaysia isn't in a haze emergency this week. But between the Southwest Monsoon, a red-rated regional outlook, and open-burning cases already climbing in Sarawak, this is the point in the year when it pays to know where to check the numbers — before you need to.