Brazil's most populous state of Sao Paulo is on the cusp of an unprecedented water crisis stemming in part from one of the worst droughts in decades. Al Jazeera's Gabriel Elizondo reports from Sao Paulo. Subscribe to our channel http://bit.ly/AJSubscribe Follow us on Twitter https://twitter.com/AJEnglish Find us on Facebook https://www.facebook.com/aljazeera Check our website: http://www.aljazeera.com/