This is what it looks like in Northern Thailand this week. That was yesterday. Today the Sun, even at high noon is totally blocked. Can’t even tell where it is in the sky (see the last photo).
No, it’s not cloud cover, its the smoke from slash and burn farmers just over the border in Myanmar (Burma) 50 miles away. Their mountains are ablaze as a way of clearing the land for Spring planting of small crops. So much smog! Asthmatics beware.