Beijing Issues Orange Alert as Severe Air Pollution Traps Region

What changed

Beijing activated an orange alert for severe air pollution at midnight on November 11, as forecasters warned of a regional pollution episode lasting through November 14. Air quality could reach level 4, or moderate pollution, across the city, with some places and times reaching level 5, or severe pollution.

The Beijing-Tianjin-Hebei region is facing weak winds, an inversion layer, pollution transported northward by southerly winds, and rising humidity. Together, those conditions can trap particles close to the ground.

Why it matters

This is not simply a visibility problem. The weather is creating a shallow lid over the region, leaving pollution with little room to disperse. Moisture makes particles swell, worsening both visibility and PM2.5 levels.

Children, older adults, pregnant people, and those with asthma, coronary heart disease, hypertension or other chronic conditions should stay indoors with windows closed. Everyone else should limit outdoor exertion, especially running and cycling. If going outside is necessary, afternoon is the better window because haze is typically heavier overnight and in the morning; a KN95 or N95 mask is advised.

Drivers should use fog lights, slow down, leave more space between vehicles and choose public transport where possible. Persistent coughing, chest tightness, shortness of breath or palpitations warrant medical attention.

The likely turning point is a sufficiently strong, sustained cold-air outbreak. It could replace the polluted air, stir the lower atmosphere and reduce humidity. But if that cold air is weak or brief, pollution may simply shift southward, and returning southerly winds could rebuild the haze after a short improvement.