The dengue inspectors

Sao Paulo is currently experiencing a severe water shortage.

Across the city many people are storing water in their homes out of fear that they will be cut off with little warning.

But the buckets and pots of water have created a hidden menace - they are creating breeding grounds for mosquitoes that carry dengue fever.

Luis Barrucho went to see a team of health officials - the dengue inspectors - who are working to tackle this problem.