The fire broke out early in the morning at a foam and plastic pallet manufacturing factory in a southeastern part of Bangkok, near Suvarnabhumi airport.
The photos showed nearby houses with smashed windows and debris on the streets.
Firefighters were still working to contain the blaze hours later, and authorities ordered an evacuation of the area amid fears that thousands of liters (gallons) of leaking chemicals could cause more explosions.
There was no immediate information on what could have caused the fire in the Bang Phli area or if anyone was injured or killed.
Local media reported that the initial explosion shook the terminal building in Suvarnabhumi, setting off alarms at Bangkok’s main international airport.
Airport officials said no flights had been canceled, but did not offer any other immediate details.