Which of the following can be a difficulty when fighting a basement fire?

Fighting a basement fire presents unique challenges, and limited entry and exit routes is a significant concern. Basements often have narrow stairwells, low ceilings, and confined spaces that can restrict the movement of firefighters. This limitation can hinder their ability to quickly enter or exit the area, especially in emergencies where swift evacuation is necessary. The challenging egress can impede both firefighting efforts and the safe retreat of personnel if conditions worsen.

In comparison, while thermal imagers are useful tools to locate victims and hot spots in low visibility conditions, their presence does not inherently pose a difficulty. Lighting can be an issue, as basements often lack adequate natural light, but it can typically be addressed with portable lighting equipment. High smoke levels can reduce visibility and create hazardous conditions, yet they do not uniquely impede movement in the same way that restricted access does. Therefore, the limitation of entry and exit routes stands out as a particularly critical challenge when combating basement fires.