I smelled gas coming out of the sewers in Tampa MONTHS AGO.  I called the fire department.  They said its just methane.    The lead of the team that came out told me he had been doing this for SO MANY YEARS and he knows what he is talking about.  This is why they use the sewer.  Because it already smells like gas.   I had a very vivid waking dream of the whole neighborhood blowing up into flames because of someone lighting the sewers on fire. 

 I responded to the fire lead with the fact that my neighbor recently saved our other neighbor from the flames when his house was burning down when I wasn't in town.  I didnt witness this.  I told him that he needs to understand that sometimes he doesn't know what he is talking about and sometimes they can't get there in time.  I haven't seen that crew since.  There is no such thing as being over cautious when it comes to the safety of your community.