The Kingdom saw the mercury nudge 30 degrees yesterday - and it could be just as hot today.
An amber alert means there could be adverse health effects experienced by people vulnerable to extreme heat, and it could also impact on local services.
In England there is a first ever red alert in place as temperatures could hit 40 degrees in some places.
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In Kirkcaldy it was 20 degrees before 8:00am this morning, and should peak around 24-25 degrees.
Cupar is likely to record a high of 27 degrees, and Dunfermline 28 degrees.
The weather is then likely to change overnight with rain forecast for the rest of the week.