Firestorms
In 1941 Charles Portal of the British Air Staff advocated that entire cities and towns should be bombed. Portal claimed that this would quickly bring about the collapse of civilian morale in Germany. Air Marshall Arthur Harris agreed and when he became head of RAF Bomber Command in February 1942, he introduced a policy of area bombing (known in Germany as terror bombing) where entire cities and towns were targeted.
One tactic used by the Royal Air Force and the United States Army Air Force was the creation of firestorms. This was achieved by dropping incendiary bombs, filled with highly combustible chemicals such as magnesium, phosphorus or petroleum jelly (napalm), in clusters over a specific target. After the area caught fire, the air above the bombed area, become extremely hot and rose rapidly. Cold air then rushed in at ground level from the outside and people were sucked into the fire. The most notable examples of this tactic being used was in Hamburg (August, 1943), Dresden (February, 1945) and Tokyo (March 1945). …
(3) Major-General Kehrl, report on the firestorm in Hamburg in August, 1943.
Before half an hour had passed, the districts upon which the weight of the attack fell were transformed into a lake of fire covering an area of twenty-two square kilometres. The effect of this was to heat the air to a temperature which at times was estimated to approach 1,000 degrees centigrade [1,832° F – ed.] . A vast suction was in this way created so that the air “stormed through the streets with immense force, bearing upon it sparks, timber and roof beams and thus spreading the fire still further and further till it became a typhoon such as had never before been witnessed, and against which all human resistance was powerless.” Trees three feet thick were broken off or uprooted, human beings were thrown to the ground or flung alive into the flames by winds which exceeded 150 miles an hour. The panic-stricken citizens knew not where to turn. Flames drove them from the shelters, but high-explosive bombs sent them scurrying back again. Once inside, they were suffocated by carbon-monoxide poisoning and their bodies reduced to ashes as though they had been placed in a crematorium, which was indeed what each shelter proved to be.