Temperatures broke 90 and the heat index reached triple figures Sunday during the fast-moving upper-floor blaze at the 2½-story wood-frame house on Madison Avenue.
Firefighters were forced into an exterior attack about 45 minutes after they arrived.
A neighboring home was also damaged in the three-alarmer.
The extent of the victims' injuries couldn't immediately be determined.
The Passaic County Emergency Services ReHab Canteen Unit provided a misting tent, chair, fluids and snacks.
Firefighters returned Monday morning to douse hot spots.
PHOTOS: Victor Scrivens
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