Flames broke out around 6:15 a.m. on the 800 block of Andover Street in Lansdale, Pennsylvania.
Crews arrived on scene to find heavy fire and smoke engulfing two attached homes with reports of people trapped inside.
One person was found dead inside one of the homes. The victim has not been identified.
The fire was placed under control around 7:45 a.m.
There are no reports of any additional injuries at this time.
Investigators say residents from at least four homes have been displaced and are being assisted by the Red Cross.
The cause of the fire remains under investigation.