Gassing probably works better if the cockroaches can fly (which is the case in the tropics). It would really suck if a flaming flying cockroach burned the neighborhood down.
Living in Florida makes you a roach connoisseur. German cockroaches are almost always a sign of filth, somewhere. Regular American Cockroaches will often squeeze in through the tiniest crack, no matter what you do. Asian cockroaches will fly at you when you try and step on them And don’t get me started on Palmetto bugs, which are a couple inches long and stink when you step on them. Fortunately, you usually only see them in garages for some reason.
A former co-worker who had worked as an exterminator once told me a story about being called out to a call at an elderly man’s house in the early 1970’s by his grandson who lived out of state. The complaint was a mild roach infestation and to check for termites and possible squirrels in the attic.
The house was a long shotgun shack that the man and his parents, (who were freed slaves) before him had lived in since the 1890’s. When he arrived, the walls were black and moving and the house actually swayed with every step you took. When he started spraying the baseboards, the roaches moved up the wall and started falling off like a brown tidal wave. He noped the fuck out and as he was leaving, leaned his arm against the 1950’s fake wood panelling on the wall as he tried to shake the roaches out of his hippie hair. The panelling had been eaten from behind by termites and he fell completely through the wall. All that was left was the printed wood-grain pattern paper. The termites had eaten all the wood from behind and the roaches had finished off the glue. Tearing the wall out also revealed the rat raceways leading from the floor to the attic.
He had to call City Code enforcement, who met him there and immediately condemned the place. The termite mudtubes were pretty much the only thing still holding it together. The old man got moved to a nursing home and the Fire department burned the place down the next week.