Here's a rewritten and improved version of the original text in English, with added details to make it more natural and engaging, while keeping the key information intact and expanding it to meet the 500-character minimum: --- Here’s a summary of the 4-11 alarm fire that occurred on Saturday at 2444 W. 21st Street, based on reports from multiple sources: At 1:08 PM, Engine 23 and Engine 109 were dispatched for a rubbish call near 2500 W. Cullerton Street, but they were redirected to assist with a fire at 2444 W. 21st Street. Alongside them, Truck 32, Truck 7, Battalion 4, Tower Ladder 5, Squad 1, Command Van 2-7-1, Battalion 14, and Paramedic Field Chief 4-5-7 arrived on scene. By 1:13 PM, the situation escalated to a Still & Box Alarm, with heavy smoke reported from the second floor and multiple first-floor windows. Additional units like Engine 18, Engine 26, Truck 8, Ambulance 33, Deputy District 1, Battalion 15, Battalion 2, and Paramedic Field Chief 4-5-1 were sent in. At 1:20 PM, the alarm was upgraded to 2-11, with reports of heavy fire throughout a 3-story warehouse measuring 200x150 feet. Firefighters went defensive, and Battalion 2 requested the CTA Pink Line to be shut down due to safety concerns. More units joined, including Engine 28, 38, 39, 103, Truck 48, Tower Ladder 54, Truck 52, and several battalions and paramedics. By 1:31 PM, a reserve snorkel was requested, and the size-up was corrected to at least 300x150 feet. Engine 107 and Engine 35, along with the reserve snorkel (6-6-1), were deployed. At 1:38 PM, the alarm was raised to 3-11, with additional tower ladders arriving. By 1:45 PM, it became a 4-11 alarm, with an EMS Plan 1 and Level 1 HazMat response. Multiple engines, ambulances, and HazMat units were on scene. By 1:58 PM, two master streams were being used on the west side of the building, but progress was slow. At 2:00 PM, the EMS Plan 1 was secured. At 2:04 PM, all officers switched to Channel 5 Command. By 2:30 PM, 11 master streams were active, and gas company crews were working to shut off the main and connect to the sprinkler system. The 4-11 alarm was finally struck out at 3:46 PM. *Note: Units with underlined names were actively engaged in operations (pumping water, extending ladders, etc.) Thanks to Dave, Scott, and Bill for the updates. You can find the previous report here.

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