Sunburn is drying out and shrivelling up.
Sunburnt fruit from last week is drying up (above) and will drop out before harvest. This fruit should not affect the quality of your harvest - although some yield loss will have occurred where high amount of sun scorching and heat damage have occurred.
Vines have survived the heatwave of 2010 in much better condition than the late January heatwave of 2009. Be alert for further heatwaves and try to get as much water into your subsoil as possible in the days leading up to the heat. Anti-stress or sunscreen products may help but seek your wineries permission first before applying.
In the medium term post harvest care of vineyards takes on an increased importance. Vineyards have experienced tough, dry growing conditions for 4 out of the last 5 years (2007, 2008, 2009 and 2010). Many vineyards have been reduced in vigour compared to the middle of this decade 2005/06.