Outlets sparking, landlord will not fix.

[Shelby Shaw]

I have a friend in California who is having issues with the home she is renting. She has told the landlord and they will not fix the problems. 1. The heater doesn't work, they are having to use portable heaters to keep the house warm. They sent someone out last December to check the heater and they never fixed the issue. 2. The outlet by their bed started sparking when her phone was plugged in, it ended up burning the outlet. She's afraid to use the portable heaters now, because of the outlets. Which means the house isn't staying warm. Any suggestions on what she could do next?