Check out the Savannah Biome page at varanustalk.

The Savannah does have a Temporary dry season, it does suffer Temporary droughts and it does have Occasional wildfires that scorch the earth, yet these monitor lizards prevail and flourish. The key is in the burrowing capacity of monitors. They simply bore into the ground and wait for the generous monsoon season to start, the humidity soars, it rains daily and food is plentiful.