WALTHAM, Mass. (WHDH) – Fire crews say winter weather was to blame for a crash in Waltham.

Crews were responding to an alarm when their truck slid on a patch of black ice.

The truck took down a power pole as well as several power lines.

Authorities say the incident could have been worse if not for a boulder that stopped the truck.

Three firefighters were taken to the hospital but are expected to be OK.

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