Originally Posted by
jiejie
These are insane numbers. I can only remember it getting this bad (actually over 1000) last year on the evening of Chinese New Year. Glad I'm not there right now. This is seriously dangerous pollution even for healthy adults.
At least for CNY it is largely due to fireworks and probably more localized spiked readings. This is a pretty persistent escalation throughout the day. Averaged 24 hr AQI reading for Saturday was >500. Reports are saying this high pollution will persist until Tues.