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"I remember an explosion ... I looked out the windows 'cos the windows exploded, and the street below caved in ... you could see below the street, and at that point there was like fireballs coming up..."

Thermal Hot Spots:
Fingerprint of a WTC Demolition

Below are the temperatures of hot spots in the World Trade Center wreckage five days after the buildings came to ground:

World Trade Center Hot Spots - September 16, 2001

Hot SpotTemp C
A727
B557
C627
D517
E437
F427
G747
H547

Source: USGS Spectroscopy Lab

The temperatures of two of the hotspots are in excess of 700C.

The following table gives approximate metal temperatures by color.

 

Lead (Pb) Melts
Faint Red
Blood Red
*Aluminum Melts
Medium Cherry
Cherry
Bright Cherry
Salmon
Dark Orange
Orange
Lemon
Light Yellow
White
*Steel Melts
*Iron Melts
*Thermite (typical)

 F

621
930
1075
1221
1275
1375
1450
1550
1630
1725
1830
1975
2200
~2750
2800
>4,500

 C

327
500
580
660
690
745
790
845
890
940
1000
1080
1205
~1510
1538
>2500

K

601
770
855
933
965
1020
1060
1115
1160
1215
1270
1355
1480
~1783
1811
>2770

Red hot metal being retrieved from the WTC wreckage.

The metal was red hot.

"We've had some small windows ... and it looks like an oven ... a bright, bright reddish orange color."

When first erupted from a volcanic vent, lava is a liquid at temperatures from 700 to 1,200 C (1,292 to 2,192 F), so the following gives an idea of what lay beneath the WTC wreckage.

Conventional fires cannot account for this.

Thermite can.


See also:

How Did the WTC Fires Burn for Months?
The 9/11 WTC Collapses: An Audio-Video Analysis


What Really Happened