By Richie Ramos

VACAVILLE (CBS13) – Improperly discarded cigarettes were determined as the cause of a 90-acre fire that threatened homes in Vacaville, jumped Interstate 80 and injured a firefighter on Friday.

The Midway Fire burned near Midway Road and Interstate 80. Forward progress was stopped by around 3:45 p.m.

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According to the Vacaville Fire Department, the fire jumped I-80 and burned from eastbound I-80 to Weber and Lewis Roads.

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“One careless act by one person that affected so many and wreaked havoc to many Friday evening commutes, didn’t have to be,” the fire department said in a Facebook post confirming the cause.

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Details regarding the firefighter’s injury were not released. It was only described as minor.