This is the 11901st most frequent Russian word.
запылал
"Запылал" means "flared up" or "began to burn brightly."
Here, 'запылал' describes a vivid or metaphorical reaction, indicating that his face physically appeared red as if burning due to strong emotions.
Его лицо запылало от стыда.
His face flushed with shame.
In this sentence, 'запылал' is used literally to describe the fire burning brightly.
Костёр запылал в темноте леса.
The bonfire blazed in the dark forest.
This phrase uses 'запылал' to describe a situation where the city is consumed by fire, perhaps metaphorically indicating destruction.