The Junkers Ju-52 carried a maximum bomb load of 1000 lbs, which is probably a big reason (along with it's slow speed) it didn't see much use as a bomber.    

 ==== Dresden, Rotterdam, and Hiroshima ==== 

 Aside from my doubts about a firestorm occurring, here is a list of well known firestorms (mostly from WW II): 
 {|class="wikitable" 
 !City / Event 
 !Date of the firestorm 
 !Notes 
 |- 
 |Wuppertal (Germany) 
 |10 May 1943  
 | 
 |- 
 |Hamburg (Germany) 
 |24 July 1943 
 |(45,000 dead) 
 |- 
 |Remscheid (Germany) 
 |31 July 1943 
 |  
 |- 
 |Kassel (Germany) 
 |23 October 1943 
 |(10,000 dead)  
 |- 
 |Kaiserslautern (Germany) 
 |14 July 1944 
 | 
 |- 
 |Braunschweig (Germany) 
 |15 October 1944 
 |(2,600 dead) 
 |- 
 |Saarbrücken (Germany) 
 |5 August 1944 
 | 
 |- 
 |Darmstadt (Germany) 
 |11 September 1944 
 |(12,300 dead) 
 |- 
 |Stuttgart (Germany) 
 |12 September 1944  
 | 
 |- 
 |Heilbronn (Germany) 
 |6 December 1944 
 |(6,500 dead)  
 |- 
 |Ulm (Germany) 
 |17 December 1944 
 | 
 |- 
 |Dresden (Germany) 
 |13 February 1945 
 |(35,000 dead)   
 |- 
 |Pforzheim (Germany) 
 |23 February 1945 
 |(21,260 dead) 
 |- 
 |Mainz (Germany) 
 |27 February 1945  
 | 
 |- 
 |Tokyo (Japan) 
 |9 March 1945 
 |(120,000 dead 12-16 square miles  
 (31 - 41 km²) of city destroyed)   
 |- 
 |Würzburg (Germany) 
 |16 March 1945 
 |(5,000 dead)  
 |- 
 |Kobe (Japan) 
 |17 March 1945  
 | 
 |- 
 |Hildesheim (Germany) 
 |23 March 1945  
 | 
 |- 
 |Hiroshima (Japan) 
 |6 August 1945 
 |(90,000 dead from blast/firestorm, 4.4 
 square miles (11.4 km²) destroyed)   
 |} 

 I mean no disrespect to those who died in these raids but comparing it to Hiroshima or stating that raids like the March 9 1945 raid are less well known. (Tokyo was more heavily damaged by that raid than Hiroshima.)