The Welsh and UK governments have called together all the bodies responsible for the safety of old colliery waste tips.
It comes after a number of landslides following heavy rain during Storm Dennis raised fears about the safety of old coal tips in the valleys.
Immediate inspections were underway after people living close to them told ITV News they were concerned a more serious incident could happen.
The First Minister said geotechnical engineers had been at the site in Tylorstown, which experienced a large landslip, to monitor how much the mountain has or is moving.
In a statement following a meeting with a number of authorities and organisations, information will be provided to people living in the south Wales valleys about the safety of local tips.
There will also be a "joint plan of action" after the partial collapse of a tip in Tylorstown.
The Welsh and UK Governments said they will jointly co-ordinate the work and another meeting will take place next week.