The Naga fireballs also known to as Mekong lights, by the locals, is a phenomenon with unconfirmed source said to be often seen in Thailand’s Mekong river, which is also seen in (NongKhai province in Isan) and in Laos (Vientiane Province) - in which glowing balls are alleged to naturally rise from the water high into the air.
The balls are said to be reddish and to have diverse sizes from smaller sparkles up to the size
They quickly rise up to a couple of hundred metres before disappearing. The number of fireballs reported varies between tens and thousands per night.
The fireballs are most often reported around the night of Wan Ok Phansa at the end of the Buddhist rains in late October.
Naga fireballs have been reported over an approximately 250 kilometre long section of Mekong river with the center of this section approximately at PhonPhisai town in Amphoe Phon Phisai.