The latest incident happened just before noon today at an apartment off Fresno Street and Belmont Avenue in Central Fresno.
Firefighters found smoke coming from a two-story multi-unit building.
There were two people inside, including an 8-year-old child. They both escaped without any injuries.
Neighbors used fire extinguishers to help knock out the flames.
Investigators later learned it was caused by a child playing with a candle.