The effects of the massive raids using a combination of
blockbuster bombs (to blow off roofs) and incendiaries (to start fires in the exposed buildings) created
firestorms in some cities. The most extreme examples of which were caused by
Operation Gomorrah, the
attack on Hamburg, (45,000 dead),
attack on Kassel (10,000 dead), the
attack on Darmstadt (12,500 dead), the
attack on Pforzheim (21,200 dead), the attack on Swinemuende (23,000 dead) and the
attack on Dresden (25,000 dead).