Thanks for your query.

You can obtain burned area data from MODIS (MCD65) (GeoTIFF, shape and HDF files) from http://modis-fire.umd.edu/pages/BurnedArea.php
The algorithm doesn't pick up small / cool fires so that may only get you so far.

You can try using the 721 band combination in Worldview: https://earthdata.nasa.gov/files/Using_721_for_NRT_burned_area_web.pdf

In the not too distant future there will be a VIIRS burned area product but this is not available yet. You can find out more here: https://viirsland.gsfc.nasa.gov/Products/NASA/BurnedAreaESDR.html

I hope this helps
best
Diane