"intense flames" is correct and can be used in written English.
You could use it to describe a fire that is particularly strong and hot: "The fire had spread and engulfed the building, the intense flames reaching up to the night sky."
Several neighbors tried to enter the home but were driven back by intense flames and heat.
Mayor Kasim Reed said the authorities did not know yet what caused the fire, which produced intense flames and noxious fumes that prevented utility workers from accessing the tunnels for several hours.
It bursts into intense flames.
A firefighter based in Limavady who braved intense flames to rescue a colleague has been awarded the Queen's Gallantry Medal.
"They were very intense flames," he said.
Spot fires, intense flames rage as crews fight Yosemite Rim blaze .
Iit can be safely handle under water, but will burst into intense flame once dry.
When the recycle ratio is reduced from 75%to68%8% the flame becomes increasingly luminous and at 68% an intense flame was observed well anchored into the burner quarl.
Intense flame-generated vorticity is measured which has a magnitude that exceeds that of the incident vortex in some cases.
The AlFA-50 composite demonstrated the highest reactivity (most intense flame and shortest time to achieve complete deflagration) during air combustion experiments performed on consolidated pellets.
A grill with one side that's hot and one side that's cool — one side with no or very little fire underneath it — is what you need: put the wings on the cool side, cover the grill and let the ovenlike heat melt the fat away through the grates without any fear of an intense flame burning the skin from below.
