Morocco Heatwave Alert August 4, 2026: DGM Orange Vigilance, 44-47 C, Sandstorms in the South

On Tuesday August 4, 2026, Morocco's Direction Generale de la Meteorologie (DGM) escalated its heat warning to orange vigilance, placing a large swathe of the country under a heatwave expected to last from Tuesday August 4 through Thursday August 6. Temperatures of 44-47 C are forecast across the southern and Saharan provinces, with Es-Semara expected to reach around 47 C, while strong winds and localized sandstorms threaten the far south. This is the most intense heat episode of the week we mapped in our August 3 national forecast, and it is consistent with the pattern described in our full August 2026 heatwave guide.

The alert in one paragraph

The DGM bulletin issued on August 4 confirms a heatwave with temperatures oscillating between 44 C and 47 C across the south and south-east of the kingdom through Thursday. The southern and Saharan provinces bear the brunt, the interior plains (including Marrakech, Fes and their surroundings) follow at a slightly lower tier, and the Atlantic coast - though not under the highest alert - still experiences unusually warm conditions for early August. Alongside the heat, the DGM warns of strong winds of 75-80 km/h with localized sandstorms in the deep south.

Which provinces are affected, and how badly

Heatwave impacts are sharply stratified by geography. Based on the DGM alert structure and confirmed reporting for the August 4-6 episode:

The single hottest spot is Es-Semara, forecast near 47 C. In these conditions, the danger is not just the peak reading but the duration: the DGM defines a heatwave as at least three consecutive days above seasonal normals, and this episode runs a full three days (Tuesday to Thursday), with tropical nights in the south where minimums fail to drop below 30 C.

The wind and sandstorm dimension

Heat is only half the story. The DGM pairs the heatwave alert with a wind warning: gusts of 75 to 80 km/h are forecast in the provinces of Aousserd, Oued Ed-Dahab, Boujdour, Laayoune and Es-Semara, with localized sandstorms expected.

Practical consequences:

• Severely reduced visibility on desert roads, sometimes near-zero in blowing sand.
• Respiratory stress - fine dust particles irritate airways, compounding the health risk of the heat itself.
• Aviation disruption at southern airports (Laayoune, Dakhla) is possible during peak gusts.
• Infrastructure - the combination of heat and dust stresses electrical transformers and air-conditioning systems, which already run at maximum load.

Why the south is so much hotter: the Chergui and the desert heat low

The geographic concentration of the extreme heat is not random. Two mechanisms combine:

1. The desert heat low. In summer, the Sahara develops a broad thermal low-pressure system. Air rises over the intensely heated desert, drawing warm, dry air southward across Morocco's interior.
2. The Chergui wind. When the pressure gradient is right, this hot, dry air flows down from the south-east over the Atlas, warming further by compression as it descends - the foehn effect. The Chergui can raise temperatures by several degrees in a matter of hours and is the mechanism behind the most extreme Moroccan heat spikes.

This is why Marrakech, Fes and the interior plains see sudden temperature jumps during a heatwave even though they sit far from the Sahara: the Cherguri carries the desert heat right over the mountains.

Health precautions: the four rules

Moroccan health authorities and the DGM heatwave plan emphasize four priorities during an orange alert:

1. Hydration. Drink water regularly throughout the day - not only when thirsty. Avoid alcohol and very sugary drinks, which dehydrate.
2. Avoid the midday sun. Stay indoors between 11:00 and 17:00, the peak danger window. If you must go out, wear light-coloured, loose clothing and a hat.
3. Cool the body and the home. Take cool showers, use damp cloths, and close shutters and curtains on sun-facing windows during the day; open them only at night once the air cools.
4. Check on vulnerable people. The elderly, young children, pregnant women, and those with chronic illness (cardiovascular, respiratory, diabetes) are at greatest risk. Phone elderly relatives at least twice a day.

Never leave a child or an animal in a parked vehicle - interior temperatures can exceed 60 C within minutes under an August sun.

Travel advice

• Roads in the far south (Laayoune-Dakhla, the N1 and N12): expect blowing sand and sudden visibility loss. Slow down, switch on headlights, and if visibility drops to near-zero, stop well off the road and wait it out.
• Marrakech, Fes, interior cities: plan sightseeing for the early morning; most riads and hotels will have air-conditioning - confirm before booking.
• The coast is the refuge: Casablanca, Rabat, Essaouira and El Jadida stay in the high 30s rather than the mid-40s, thanks to the oceanic influence and morning fog described in our August 3 forecast.
• Flights: check status for Laayoune (EUN) and Dakhla (VIL) if wind gusts peak; sandstorms can briefly close southern runways.

How this fits the wider summer pattern

Morocco is warming faster than the global average - 2024 was the warmest year ever recorded nationally, with a thermal anomaly of +1.49 C above the 1991-2020 baseline. The country now averages about 20 heatwave days per year, a figure that continues to climb. The August 4-6 episode is therefore not an outlier but part of a clear trend: each summer now brings multiple orange-alert episodes, and the south is bearing the largest increase in extreme-heat days.

For the meteorological background on Moroccan heatwaves and historical context, see our complete heatwave dossier.

Sources

• Direction Generale de la Meteorologie (DGM), orange vigilance bulletin, diffusion 4 August 2026 (21:09 GMT).
• Medias24, "Vague de chaleur: jusqu'a 47 C attendus dans plusieurs provinces du Royaume" (4 August 2026).
• Morocco World News, "Morocco Issues Orange Alert for Heat Wave Reaching 47 C" (August 2026).
• SNRTNews, DGM bulletin summary for 4-6 August 2026.

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Track the week's weather in our August 3 national forecast and read the full August 2026 heatwave guide for the month-long outlook.