Madame Lelanne was already there.

She had thrown a few things into a bundle, and her foot was again upon the ladder, when it seemed to her that someone struck her, hurling her back upon the floor, and the house the other side of the yard rose up into the air, and then fell quite slowly, and a cloud of dust hid it from her sight.
Madame Lelanne must have carried her down the ladder.

She was standing in the yard, and the dust was choking her.

Across the street, beyond the ruins of the hospital, swarms of men were running about like ants when their nest has been disturbed.

Some were running this way, and some that.