Post user location to a map
For the location to be displayed on the google map,You need to install few modules:-


Install GMAP and LOCATION module,
Install GEOLOCATION and its dependent modules.
Add a field in content type with field type GEOLOCATION  and widget type GOOGLE MAP.
With this, When the user will ad content,he will be able to mark the location of the area of the power cut on the map.
Refer this GEOLOCATION for further help.