Update 2018-03-28: High levels of air pollution are still affecting Beijing due to persisting smog and a sand storm on Wednesday (28 March). The population was advised to keep windows and doors closed, to wear scarves and dust masks, and to drive slowly due to poor visibility.
2018-03-25: Authorities in Beijing issued the second-highest smog alert due to high levels of air pollution on Saturday (24 March). The alert level is in place in the Jingjinji Metropolitan Region (Beijing-Tianjin-Hebei) from Monday (26 March) until Wednesday (28 March). Companies involved in furniture, cement, and heavy industries have to limit their production by 30 to 50 percent.
Besides health risks resulting from air pollution, smog has occasionally lead to extensive travel disruptions in the past (driving bans, flight cancellations due to poor visibility, closed highways). Travellers are advised to limit their outdoor activities and to inform themselves via local media and authorities about the worst-hit regions.