The huge blast was felt and seen for miles. Residents as far away as Anaheim and Huntington Beach reported feeling the explosion. Eyewitnesses captured the dramatic explosion as it unfolded.
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The massive explosion happened around 12:30 p.m. in the 400 block of West Francis Street, shattering nearby windows and sending a huge plume of smoke into the air.
City officials said the fire erupted after "a large amount of fireworks at a house ignited." At least one other home was also burning, along with several outdoor structures on a ranch-like property.
Watch videos above from eyewitnesses who captured footage of sparks flying in the air amid the smoke plume, as frightened residents fled from the scene.
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2 killed when fireworks ignite at Ontario home, setting off explosions, fire
Witness video shows fireworks explosions at Ontario home