The study proposed to parameterize the impacts of disasters caused by floods, which partially or substantially compromise the local government's response capacity, assisting protection technicians and civil defense, in their field activities, to support the processes of recognition emergency situation (SE) and the state of public calamity (ECP), as well as managers and analysts to make decisions through objective data that, related to each other, can express mathematically impact of the event. Normative Instruction nº 002 / MI does not clearly and objectively state the criteria for decreasing and recognizing abnormality situations. The equation known as the Disaster Impact Indicator is derived from the variables adopted from the congregation and mathematical and statistical artifacts, from consolidated data related to Disaster and Risk Management, such as quantitative human damages, material damages, economic losses, in addition to rates of precipitation and vulnerability, as well as the capacity of confrontation of the local public power. In the State of Pará hydrological disasters correspond to 80% of the occurrences of these 30% are the floods, affecting more than 50 thousand people in 26 years of records, occurring mainly in the period known as Amazonian winter. The city of Monte Alegre / PA was the most affected, with 5 flood records only in the last 3 years, 2 of which were recognized due to an emergency situation. The proposed equation serves as a substrate for the creation of regulations, which deal with criteria for recognition of local response capacity impairment, which will standardize actions in damage and loss assessments, and may be implemented at the national level, for flood disasters, using the relative attributes in each variable, according to the reality of each State.
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