What did Stewart mean by a “white hot” wall of fire?

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Stewart Described the Fire as "White Hot" Due to its Extreme Temperature

Ken Stewart described the approaching bushfire as a "white hot" wall of fire when it was approximately 100 metres away. This intense visual phenomenon was accompanied by strong winds of 60-70 kilometres per hour.
The Appearance of the Fire

Stewart's account detailed a fire that was not its usual red or orange hue, but instead appeared "white." This description suggests the fire had reached an exceptionally high temperature.
Understanding Fire Temperatures

Generally, the colour of a flame can indicate its temperature. While red flames signify moderate temperatures, orange flames indicate hotter conditions, and yellow flames are even hotter. White flames, as described by Stewart, represent the hottest visible temperatures of a fire, often exceeding 1,000 degrees Celsius. This intense heat is associated with the complete combustion of fuel and the incandescent state of soot particles and gases within the flame.
Extreme Fire Conditions

The presence of a "white hot" fire, coupled with winds of 60-70 km/h, signifies extremely dangerous and rapidly progressing fire behaviour. Such conditions are characteristic of severe bushfires, where the sheer intensity and speed of the blaze pose a significant threat to life and property.

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What did Stewart mean by a “white hot” wall of fire?

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