Reuters report that an entire street in Philadelphia, Pennsylvania was covered by cockroaches that emerged from a sewer drain: https://www.reuters.com/article/us-philadelphia-cockroaches-idUSKBN1A3293
Residents of a Philadelphia street were horrified when thousands of cockroaches emerged from a sewer drain, forming a swarm so big that it covered the street at one stage, according to city officials and local media.
"There were thousands of them," resident Pat Wall told NBC10 television of the incident. "It was a horror story that I couldn't believe I was living."
A small task force of city workers found the source of the infestation, a drain clogged with refuse, said John DiGiulio, a spokesman for the Philadelphia Water Department. That may have contributed to the swarming in the city's riverfront Bridesburg neighborhood, he said.
Roaches are a fact of life all over the city, and the creatures thrive in warm, moist environments, DiGiulio said.
"It's unfortunate but they do live in those type of environments," he said. "It could have been a disturbance or anything to make them come out."
Health department workers will also bait the sewer line in an effort to fight the bugs.