BRISTOL, Wis. — Firefighters from multiple departments rushed to the 21100 block of 121st Street Monday afternoon after a brush fire spread into a swampy field near Lake Shangri-La, prompting a large-scale emergency response

According to Kenosha County fire dispatch traffic, the fire began when a resident burning brush lost control of the flames. Callers reported the fire quickly spread from a brush pile into a nearby field and swamp area.

Dispatchers told responding units that neighbors were knocking on doors and urging nearby residents to leave the area as the flames spread. Initial reports indicated the fire was burning in a field behind a residence near 21124 121st Street.

Fire crews arriving on scene reported a “working brush fire” and quickly established incident command. The fire was initially referred to as a marsh or swamp fire as it burned through vegetation in the low-lying area.

Because of the risk of the fire spreading, officials activated a MABAS box alarm, bringing in additional firefighters and equipment from across the region. Departments including Bristol, Paris, Salem Lakes, Pleasant Prairie, Wheatland, Newport, Antioch, and others were called to assist. Several ATV units were also requested to help crews access the difficult terrain.

Firefighters coordinated the response using a designated fireground channel while additional resources continued arriving throughout the afternoon.

Later radio traffic indicated the alarm was escalated as crews worked to contain the flames and prevent the fire from spreading to nearby homes and structures.

No injuries were immediately reported. The extent of damage to the field and surrounding vegetation was not immediately known.

Authorities have not yet said whether the brush burning that started the fire was permitted.