Sueing an HOA?

Today the sewage pipe outside my condo and the other condos in my line backed up and spilled sewage onto the side walk. It’s a Sunday and me and other homeowners had to call multiple times before any answered the emergency line. They sent someone out who was not able to fix the problem, they said they would come back tomorrow. No one out of at least 15 condos can flush and if they do it goes out in front of my condo. I feel like this is a bio hazard and the hoa is not handling it as such. Do I have any grounds to try and take legal action for failure to fix and respond to the health problem.