Manuel, I had a similar experience a long time ago now (but I'll bet nothing's changed). Two aircraft detachment (Hueys) doing flood relief. Very long days - up before dawn to be airborne at crack of day, and usually, not back to base until after last light. No extra pilots, so no rotation/rest days possible, as every day usually involved at least one more emergency recovery, some of which involved some very demanding flying. (We were lucky - some close calls, but no accidents. However, the other squadron involved lost an aircraft and most of its crew.)
After two weeks, all pilots on the detachment were approaching their ASI max flight hours for a 30 day period. We were all knackered, falling straight into bed after a hurried evening meal, and physically unable to take up the many offers of a beer from the many people we'd literally pulled from the rooftops .
A quick call to HQ Op Com to explain the situation. Reply: "Forget the max hours limits. Continue flying."