This is because of the meltdown, he has to leave the same street he has grew up all these years. Referring to those families who just had leave to everything behind, their whole house, the road they lived on, and their town. Bruce then says that he was a fireman, probably referring to the first responders helping in the incident at Three Mile Island. After that he talks about being cheated and robbed, then his life canceled. Referring to how firefighters could have gotten hurt or died during this event.
Roulette, you're playin' with my life
Roulette, with my kids and my wife
Roulette, every day the stakes get bigger
Roulette, a different finger on the trigger Roulette is apparently playing with his life because it changing at the moment everything, you're going somewhere other than home, and you are full of fear. The next lines, talking about stakes getting bigger and a different finger on the trigger, is all relating to his feeling about how Three Mile Island affected people as it grew worse.
Down by the river that talks
The night speaks in searchlights
And shortwave radios squawk
The police patrol the streets
But I've left behind the man I used to