There are already a huge amount of data on the subject Climate Change. The use of Big Data visualization tools should be encouraged as it is quite useful to provide patterns of hidrometeorological events. To illustrate the point, have a peek at Pluviometric ID at ANA website http://www.snirh.gov.br/frst/
and you will see the whole Data Bank on precipitation in Brazil at a glance. Search for "Manual do Sistema" button for a brief introduction.