Freshwater Diversion

What began about a week and a half ago as a small seepage of water from the ground where the sidewalk meets my apartment building has grown into a multi-spout babbling brook. Steady mini-geysers are producing a strengthening flow from underground to form a stream that cascades into the street and down the nearest storm drain. I've spoken with Lackey 2.0 and Slumlord about it and they seem to be hinting that it's the city's problem. Longtime readers will know that this is far from the first time I've had trouble with the plumbing in or near my apartment. I'm starting to worry about sinkholes in the street (which have happened before) or worse under the building itself. Is there anything else I can or should do?