Banking crises in the last decades have led to the necessity of implementing macroeconomic policies and regulations to ensure an effective control in order to achieve stability and viability of the entire banking system. Thus, it is necessary the implementation of early warning systems which support the regulatory authorities and banking supervision. Early warning systems are the mechanisms that analyze and transform information held by financial indicators in the signals concerning the possibility of banking crises. These were originally developed in the United States of America, having meant to predict if and when a specific country can be affected by a financial crisis. The purpose of the work is to capture the impact of macroeconomic indicators, which emit signals over the banking system`s health and to provide an overview of the practicalities of the financial crises`s issue and ways of preventing them.