Today is the anniversary of the bombing of Dresden during WWII. (Actually, today, tomorrow, and the next day are.) The attack took between 25,000 and 100,000 lives, but specific figures remain unknown. During the air attack, 2600 tons of high explosive and incendiary bombs were dropped on the city, causing a devastating and deadly fire.
At the BBC you can hear an eyewitness audio report. There are also accounts to read here, and here. Also read Kurt Vonnegut on his time in Dresden at The Paris Review in a composite interview.
There is also a small collection at the BBC of photos, which, while grainy and black and white, are still gruesome depictions of the aftermath at street level with bodies piled on top of one another.