Bettendorf firefighters were called to an early morning house fire at 6659 Eagle Ridge Road.
The alarm came in about 5:30 a.m.
When firefighters arrived, they found smoke and fire coming from the roof of the home.
The Rock Island Arsenal, Riverdale, Moline and LeClaire fire departments were called in to assist in battling the blaze.
Firefighters were able to reach the attic and the fire was extinguished at 6:14 a.m.
The residents of the house were able to escape the fire unharmed. There were no other injuries.
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After an initial investigation, it was determined that the fire was caused by a lightning strike to the house.
Estimated fire damage is about $25,000.