Protective Intelligence · Week Ahead · No. 7

Chicago Week Ahead Security Brief: Marathon Week, October 5–11, 2026

An open-source read on how scheduled events, closures, weather, aviation and police notices constrain movement across the Chicago metropolitan region from Monday 5 to Sunday 11 October.

Shading counts the CPD pattern alerts naming each district in the 30-day alert window, published 5 September to 4 October, under the counting rule in section 05. The layers show full street closures in force during the window, taken from the City’s permit file, the marathon course, and the venues, events and meetings located in this brief. Every located item is placed from its own address or its permit’s coordinates.^{22, 2, 1, 11}

Every district, the same facts as text

Closures are distinct full-closure permits whose own coordinates fall in the district and whose dates intersect the window, construction and special events together; six permits span two districts.² The marathon course is drawn from the organiser’s segment list and passes through the 1st, 2nd, 9th, 12th, 18th and 19th Districts.¹

Alert counts are of CPD publications naming the district, not of offenses. A listed district is not a place to avoid.

Ratings score constraint on movement, not danger.

Reading the capacity figures. Every figure below is a venue maximum, not a ticket count, an attendance forecast or a prediction.

Sunday 11 carries the most constraint in the window. The marathon course removes its streets from 06:00 across the 1st, 2nd, 9th, 12th, 18th and 19th Districts, the Loop segments reopen between 10:30 and 14:00, and Roosevelt Road east of Michigan stays closed to 18:00.¹ Tuesday 6 is the second: two venues with a combined maximum of 83,217 start within 30 minutes of each other on a weekday evening, 3.23 mi apart, with West Madison Street closed from Wood to Damen and no end time stated for either event.^{4, 5, 13, 14, 8} Saturday 10 is the third: the 5K closes Loop streets from 07:00, a march assembles on North Michigan Avenue at 13:00, and Soldier Field starts at 13:30 with Roosevelt Road east of Columbus closed.^{8, 9, 6, 1}

69 distinct special-event permits touch the window: 40 block parties, 21 festivals, 4 athletic events, 3 farmers markets and 1 sidewalk sale; 54 of them are single-block, every street row of the permit lying within one hundred-number block of one street. None is for a march, rally or demonstration.⁸ Across all permit types, 595 permits with a full closure intersect the window, 458 of them single-block and 304 of them standing permits of 30 days or more; special-event full-closure permits span 8 Monday, 9 Tuesday, 9 Wednesday, 8 Thursday, 12 Friday, 38 Saturday and 23 Sunday.² The marathon course itself is set by the organiser’s street-closure schedule; the City permit covers the Grant Park staging streets.^{1, 2} The closures below remove a through route for an event, or hold a standing closure in the Loop or beside a venue.

Permit records show filings, not street conditions, and they lag emergency work.

28 alerts were published in the 30 days from 5 September to 4 October. 22 are counted; the six sexual-offense alerts are listed and not counted, and their references are not reproduced. No alert has been published since the last edition, and none inside the window by the 03:35 CDT feed reading on Monday 5. Five counted alerts are robbery-classified, the largest single class. The 1st District carries 4; the 2nd, 7th and 19th carry 3 each.²² Alert volume measures how often the Department publishes a notice, not how much crime occurred.

Published times are CDT, from the Department’s feed. Districts, series, pattern and reference are as printed on each alert, with one exception carried from the previous edition: 26-CWP-025 prints “24th (Shakespeare)”, but Shakespeare is the 14th District, and the Department’s feed title and file name both read “14th & 19th”, so it is shown as 14.²²

Each gathering below is listed with the source that announces it.

• Monday 5, 09:30 as listed, Cook County Criminal Courts Building, 2650 S California Avenue, Courtroom 208: court-support gathering organised by the Prison + Neighborhood Arts Program. Indoor. Size not stated. SECONDARY, SINGLE-SOURCE.⁹
• Tuesday 6, 17:30 to 20:00 as listed, Preston Bradley Center, Chicago Cultural Center, 78 E Washington Street: Illinois Coalition for Immigrant and Refugee Rights 40th anniversary celebration. Indoor, at a public venue. Size not stated. SECONDARY, SINGLE-SOURCE.⁹
• Wednesday 7, 07:45 to 13:45 as listed, Israeli Consulate, 500 W Madison Street: “Flood the Chicago Consulate for Gaza”, listed as an autonomous protest with no sponsoring organisation; the listing says it may run all day and anticipates opposing demonstrators. Route and size not stated. SECONDARY, SINGLE-SOURCE.⁹
• Thursday 8, 09:00 as listed, City Hall, West Entrance, 121 N LaSalle Street: Keep Chicago Housed press conference on the City’s 2027 budget. Size not stated. SECONDARY, SINGLE-SOURCE.⁹
• Thursday 8, 10:00 as listed, Cook County Criminal Courts Building, Room 201: court-support gathering. Organiser not stated. Indoor. SECONDARY, SINGLE-SOURCE.⁹
• Thursday 8, 12:00 as listed, UIC Quad, south of Harrison Street and west of Halsted Street: campus rally against sexual violence, listed as organised by Chicago Socialist Alternative. Size not stated. SECONDARY, SINGLE-SOURCE.⁹
• Saturday 10, 13:00 as listed, Water Tower Park, 806 N Michigan Avenue: “March For Palestine”, listed as organised by the Chicago Coalition for Justice in Palestine. Route, end and size not stated. A second listing for the same day, sponsored by the Palestinian Youth Movement, gives 12:00 as a placeholder and no location. SECONDARY, SINGLE-SOURCE.⁹
• Saturday 10, Humboldt Park, Fieldhouse Lot and Lawn northwest of the Fieldhouse: “Solidarity Day (Non-exclusive Use)”, two approved Park District permits. Subject, organiser, time and size not stated.²⁸
• Parade permits with no street closure: Friday 9 at 2900 S Calumet Avenue, and Sunday 11 at 2315 W Augusta Boulevard and at 3850 S Wabash Avenue, in the City’s permit records. Times, routes and organisers not stated.³¹

Edition No. 6 covered 2 to 6 October.⁴⁵

• Weather verified dry, with warmer highs and stronger gusts than forecast. No. 6 forecast Saturday 3 sunny with a high near 65 and Sunday 4 near 71 with gusts to 20 mph. Saturday recorded 69 at O’Hare and 70 at Midway, with peak gusts of 19 and 23 mph; Sunday recorded 73 and 74, with peak gusts of 23 and 27 mph. Both days recorded 0.00 in of precipitation at both airports.^{46, 45} No NWS alert named Cook County from 00:00 Saturday 3 to 04:00 Monday 5. In Lake County, NWS Chicago updated a Flood Warning for the Des Plaines River near Russell four times, from 10:24 CDT on Saturday 3 to 19:27 CDT on Sunday 4, the last until further notice.⁴⁷
• Baseball and football. The White Sox won ALDS Game 1 at Cleveland 3 to 0 on Saturday 3; Game 2 is at Cleveland on Monday 5 at 16:00 CDT, and Game 3 at Rate Field on Wednesday 7 is firm.⁷ The Bears beat the Jets 23 to 12 at Soldier Field on Sunday 4 (SECONDARY).⁴⁸
• Bridgeview. The Palestine Fest and the counter-mobilisation listed in No. 6 for Sunday 4 both took place; see In the news.⁴⁹
• Tuesday 6 forecast revised. The grid forecast now gives a high near 71 with south gusts to 25 mph, against No. 6’s 65 and 5 to 10 mph.^{18, 45}
• CPD alerts. No alert has been published since No. 6. The counted total falls from 24 to 22 because P26-5-015 (16th and 25th, published 4 September) and JK393685 (12th, published 3 September) are now outside the 30-day window; both remain in the Department’s feed.²²
• New since No. 6. Blue Line single-tracking between Addison and Montrose runs on four nights, Monday 5 to Thursday 8; No. 6 printed the two that fell inside its window.¹² Marathon week: the Grant Park staging closures, the expo, the Abbott Chicago 5K and the race.^{1, 8} ALDS Game 3 and, if necessary, Game 4 at Rate Field; Bulls preseason, Gorillaz, the Blackhawks and Olivia Rodrigo at the United Center; the Fire against New York City FC at Soldier Field.^{7, 3, 4, 6} Two demonstrations on and after the third anniversary of 7 October.⁹
• Ended as scheduled. The 95th Street and Torrence Avenue bridge closures and the 2 to 4 October festival and race permits ended on their permitted dates, and CTA’s Saturday 3 Green and Orange Line suspension has left the CTA feed.^{2, 12}
• Corrections to No. 6.
  1. ACEP26 Scientific Assembly runs 5 to 8 October at McCormick Place, according to the organiser; No. 6 gave 5 to 7 October, venue not stated.³²
  2. CTA’s weekend service page gives the start of the Saturday 3 Green Line suspension as 04:30, not 04:00; the Orange Line suspension began at 04:00 as printed.⁵⁰

In the news

Chicago

• Garage robbery and shooting in Streeterville, followed by a carjacking at a grocery garage. At about 18:30 on Friday 2 October, two masked men shot a man who refused to hand over his property on a below-ground level of a garage in the 400 block of East Illinois Street, then took a second driver’s vehicle at gunpoint in the garage at 255 East Grand Avenue (SECONDARY, citing CPD).⁵¹ For protective details: garages and vehicle approaches are the exposed points of a downtown movement, and the level is checked before the principal goes to the vehicle.
• Clash outside Palestine Fest in Bridgeview. On Sunday 4 October a small far-right group and a much larger counter-protest clashed near a gas station by SeatGeek Stadium, where the fourth annual Palestine Fest was held. Local police and Illinois State Police largely kept the groups apart, at least two people were detained, and the festival grounds stayed calm.⁴⁹ For protective details: approach routes and nearby fuel stops belong in the event perimeter plan alongside the venue gate.

World

• Cockpit attack on a flydubai flight described as attempted terrorism. On 3 October the UAE Attorney General said the co-pilot of flight FZ1073, Dubai to Tel Aviv on 30 September, attacked the captain with the crash axe and tried to take the controls; according to eyewitnesses and Israeli officials, crew and passengers entered the cabin and subdued him. Israel’s Prime Minister ordered a review of security for foreign flights on 4 October.⁵² For protective details: carrier and route vetting matters when principals fly politically sensitive routes.
• Two charged in the United Kingdom over an alleged plot against Manchester’s Jewish community. UK Counter Terrorism Police charged two Iranian nationals with preparing acts of terrorism, alleging they sought explosive-device components and conducted reconnaissance of potential targets; they were due at Westminster Magistrates’ Court on 3 October. The allegations are unproven.⁵³ For protective details: hostile reconnaissance is the stage at which trained site staff can detect a plot.

EP and VIP

• Three students charged with threatening the President before a rally in Mobile. Three University of South Alabama students appeared in federal court in Mobile, Alabama, on Friday 2 October on charges of threatening the President; federal affidavits allege threats posted on social media on 27 and 29 September in the run-up to his political rally in Mobile that day.⁵⁴ For protective details: the threats surfaced through monitoring of posts about an announced appearance, which belongs in every advance.
• Security guard arrested after a confrontation with police in College Station, Texas. After a Texas A&M football game on 3 to 4 October, police clearing the roadway at Northgate say an influencer’s security guard shoved an officer to the ground; the guard was charged with interference with public duties and the influencer with evading arrest.⁵⁵ For protective details: compliance with lawful police orders and moving the principal away keeps the detail intact, since an arrested agent leaves the principal uncovered.

Seven scheduled separations fall inside the window: 681 people at seven sites, 148 in Cook County, 101 in DuPage County, 431 in Lake County and 1 in Will County. The four Cook County sites, 148 people, are in the City of Chicago.⁵⁶

Counts and causes are as the employer filed them. Nothing in a WARN filing describes conduct, and nothing here suggests any named employer or workforce presents a risk.

Is DuSable Lake Shore Drive closed this week?

No. The City’s permit file holds no closure of DuSable Lake Shore Drive from Monday 5 to Sunday 11 October 2026. On Sunday 11 October the marathon closes Inner Lake Shore Drive between Belmont and Sheridan from 06:00 to an anticipated 12:00, and the organiser’s staging plan closes Roosevelt Road between Columbus Drive and DuSable Lake Shore Drive from 11:00 on Saturday 10 October; Balbo Drive on the same stretch is permitted closed from 24 September to 16 October. CTA reroutes southbound #136, #146 and #148 buses via Foster, DuSable Lake Shore Drive and Lawrence to 17:00 on Tuesday 6 October as printed.

What is the worst window for movement in Chicago this week?

Sunday 11 October 2026 from 06:00, when the Bank of America Chicago Marathon closes its 26.2-mile course across the 1st, 2nd, 9th, 12th, 18th and 19th police districts; segments reopen from 10:30 to 18:00 on the organiser’s anticipated times, and CTA reroutes 34 bus routes from 06:30 to 16:00. The heaviest venue window is Tuesday 6 October from 19:00, when the Blackhawks home opener at the United Center and the Chicago Fire at Soldier Field have a combined venue maximum of 83,217, with West Madison Street closed from Wood to Damen.

Which streets are closed for events?

69 special-event permits touch Monday 5 to Sunday 11 October 2026, 40 of them block parties; special-event full-closure permits span from 8 on Monday to 38 on Saturday, and 23 on Sunday. The through streets closed for events are West Madison Street from Wood to Damen for the Blackhawks home opener (Tuesday), the Grant Park drives from 04:00 Thursday, Wacker Drive, Harrison, State, Franklin and Van Buren in the Loop for the Abbott Chicago 5K (Saturday, 07:00 to 09:00 or 10:00 as printed), Clark, Halsted and Larrabee for a shakeout run (Saturday), and the full marathon course from 06:00 Sunday.

Will weather delay flights at O'Hare or Midway?

No weather constraint is forecast. The Chicago forecast is sunny or mostly sunny every day from Monday 5 to Sunday 11 October 2026, with no thunder in any hour and a probability of precipitation no higher than 7 percent; on Tuesday 6 October the south wind gusts as high as 25 mph. Neither airport carries a ground stop, ground delay program, delay or closure in the FAA status file at its 03:35 CDT update on Monday 5 October 2026.

How many CPD alerts are open?

22 CPD pattern alerts are counted for the 30 days from 5 September to 4 October 2026, across 15 districts; 5 are robbery-classified and 3 name more than one district. Six sexual-offense alerts from the same period are listed and not counted, and no alert has been published since the previous edition. The counts measure how often the Department publishes a notice, not how much crime occurred.

What is the forecast?

Dry and mild in Chicago from Monday 5 to Sunday 11 October 2026. Monday 5 is sunny, near 63; Tuesday 6 sunny, near 71, with south gusts to 25 mph; Wednesday 7 sunny, near 74; Thursday 8 mostly sunny, near 68; Friday 9 mostly sunny, near 66, with a 7 percent chance of a sprinkle; Saturday 10 sunny, near 69; Sunday 11 mostly sunny, near 74. No NWS watch, warning or advisory is in effect at the Loop forecast point, and the forecaster flags possible highs in the low to mid 80s in spots for the weekend. In Lake County, a Flood Warning for minor flooding on the Des Plaines River runs to 13:00 on Wednesday 7 October.

Each rating scores how much something constrains movement across the period. None of them scores danger, and none of them scores a place.

Every figure comes from the source named in the end notes and is held as a snapshot in this repository, so that any number here can be regenerated. Sources were retrieved on 5 October 2026 from 03:30 CDT; the weather group was re-pulled at 12:57 CDT and the Illinois alerts read at 12:54 CDT.^{18, 17, 20, 21} Nothing was estimated or carried over from a previous edition, except where section 07 quotes that edition to score it.⁴⁵

Times printed by a source with a zone, among them the MLB, NHL, NFL, Live Nation, FAA, NWS and City Clerk feeds and the CPD feed, are converted to Chicago time and labelled CDT. Times printed by a source with no zone, among them city permits, CTA alerts, the marathon organiser, event listings and ward offices, are given in 24-hour form and marked “as printed” or “as listed”.^{12, 8, 1, 9}

Street closures cover permits filed inside the City of Chicago and no suburb; a permit is a filing, not a street condition. The closure layer and the district table count distinct permits holding a full street closure active at some point in the window; section 04 counts the special-event subset separately.^{2, 8} Filming and parade permits are read from the filming resource, where a closure appears only in free text.³¹ District boundaries were retrieved once and drawn into this page as fixed geometry, so the map loads nothing at page load and works inside the PDF.¹¹

Positions are taken from a verified venue list first, then the US Census geocoder, and permitted events and closures sit on the coordinates their own permit rows carry. The marathon course is drawn through its turning points, on the Census geocoder where an address on the course places it and on the calibrated address grid at straight-street corners, so the line is approximate.¹ Crowd sizes are not forecast anywhere in this brief. Where a number appears it is a venue maximum; the United Center and Rate Field figures come from a general reference work and are tagged SECONDARY at every use.^{13, 14, 26} WARN entries are flagged by separation date, never by the date the notice was filed.⁵⁶

Download the whole edition as a PDF