1.   The only traffic in the whole area consisted of chugging yellow Navy tugboats which emitted heavy black smoke from their tall stacks.

2.   They had to fly blind through heavy smoke.

3.   As flames traveled along insulated cables, heavy smoke poured up through the building.

4.   All four were found near an emergency exit authorities said at the time might have been obscured by heavy smoke.

5.   Emergency rooms were crowded with patients suffering from symptoms related to breathing heavy smoke.

6.   Exhausted, in heavy smoke, people were lying down, DiFrancesco included.

7.   He said the first report was of a fire in the basement, where garbage had ignited and was creating heavy smoke.

8.   Heavy smoke surges heavenward, blends with that of other fires set for miles around, feeds the gray-white haze that blankets everything.

9.   Heavy smoke wafted throughout midtown.

10.   In principle, people should get out of their cars and head for the nearest exit as soon as they see heavy smoke.