Notice the situation closely as to case by case, depending on the model of the problems and risks that may affect the organization or person, such as the political situation, the various disasters, epidemic.
Observe closely a case by case basis, depending on the version of the problem and the risks that may affect the organization or employees, as the political situation, epidemics, disasters.
Observe the situation closely, as is the case, depending on the version of the problem and the risk that may affect the organization or staff. As the political situation, pestilence, disasters.