How dangerous is this wet-carpet-in-my-basement-apartment situation for me?

Basically my apartment is in the basement of an old house and when I moved in they warned me that the previous year in spring while snow was melting or it was raining hard, water had come into the bedroom of the house and they had to do some repairs and there was the possibility that it could happen again, no one could know for sure.

Well, it happened a few weeks ago and they came in and put a fan in and it was dry in a day or two. Then about a week later it happened again but more mildly that time. Now, we got 13 inches of snow three days ago and it is all completely gone so that water is now in the ground and hence, in my bedroom. It came in very suddenly, I’d been keeping an eye on it and it was dry til about 3 or 4 PM yesterday then all of a sudden half of the room was wet and there were almost small puddles! I have called my landlord and was told someone would be by in the morning to do something about it, but I just got home (didn’t wanna stay here last night and get my socks all wet of course) and it doesn’t seem that anyone has been here. That is not my question though. My question is what is the deal with mold in situations like this….how soon can it begin to grow and should I call my landlord again right now and tell them to get a move on it? The only reason I have more concern now than before is that it smells wet and damp down here, like a dank basement, know what I mean? I don’t know how fast mold starts to grow but I don’t want to die. Any input is greatly appreciated.

Also, the fan has been going all night on high and the carpet is still pretty wet.