Filters to reduce (or increase) heat mirage effects.

[cr500]

I was wondering which filters would be best to try to reduce the heat shimmer on hot days when zooming out. I realise the heat shimmer will still be there, just got to wait until things cool a little or zoom back out but I had heard that some of the detrimental effects can be reduced with certain filters.
Conversely, if we are trying to get the heat shimmer effect, any ideas on what will make it stand out for more effect?
BTW, this is mainly not for my digital cameras.