The Blue Panorama flight 1504 had uncontained engine fire just before V1 during take-off. The pilot continued the take-off and succesfully landed the plane with one engine. In the TEDx talk the pilot Maurizio Guzzetti explained that he thought that if he had followed the official protocol he would have aborted the take-off and the heavy sidewind would have pushed the heat from engine fire to the cabin and caused the cabin to catch fire and result in casualties. Instead he decided to take the plane to air, turn the plane around and land with the other side to the wind before stopping the plane. Note that the plane was over the maximum landing weight and no ability to dump fuel.
Do you think that this was a real threat and if so, what should a pilot do with similar fire starting with slower speed? Assuming the fire cannot be contained and heavy side-wind is there a reason no believe the cabin will not burn, too? However, if you're a lot before V1, it really wouldn't make sense to try to complete take-off with only one engine.
The TEDx talk: Collaborating with machines at high altitude and speed | Maurizio Guzzetti | TEDxModenaSalon
A well made animation about the accident: Bursting into Flames Just Before Takeoff in Rome | Season Finale [Real Audio]