Ah thanks. Here goes -
June 1966
Division Street, Chicago
Mary hid behind the overflowing dumpster this sounds like the dumpster is actively overflowing in the alley, thin frame quaking unsure what's quaking. The strong odor of gasoline mingled with the stench of days-old garbage as the angry young men on the street set fire to the overturned squad car. She almost missed the mewling cries of the infant, drowned out as they were by the shouts of the rioters.
The idea here is good, but I'm not pulled in. The third sentence would (IMO) be stronger if we heard the baby when she did. More in the way of she heard a sound and found a baby. I dunno.
You have similar sentence structures for 1 and 3. Consider varying those -- only because they are such distinctive structures they stand out.