Practical information for visiting Chicago

O'Hare and Midway give Chicago extensive domestic and international air access. The CTA Blue Line serves O'Hare around the clock, while the Orange Line links Midway with the Loop. Airport transfers between the two can take up to two hours by transit.

Amtrak and several regional rail services converge at Union Station. Metra uses multiple downtown terminals, so a map that says only “Chicago” is not enough; verify the exact arrival station before planning a connection.

Both airports provide passenger Wi-Fi, and mobile data is widely usable in built-up areas. Underground platforms, tunnels, very large interiors and crowded events can weaken a signal. Download tickets, addresses and one offline map before travelling.

Use normal big-city precautions, especially on crowded trains, platforms, festival grounds and around major attractions. Keep phones and wallets controlled, and do not leave bags unattended while looking at maps or ticket machines.

Conditions can change by block and time of day. Plan the final walk from a station, particularly late at night, and use a well-lit entrance or licensed ride when the route feels uncertain. Avoid describing whole neighbourhoods as unsafe; current local information is more useful than reputation.

Lake Michigan is a real water hazard. Swim only at an open Park District beach while lifeguards are on duty, obey flags and leave the water when instructed. Winter cold, summer heat and thunderstorms can also turn a routine walk into a health risk.

For route choice, fares and accessible stations, use the separate Getting Around Chicago guide.

Medical care in the United States can be expensive. Carry insurance that covers treatment and, where relevant, medical transport. Save the insurer's assistance number before an emergency.

On hot days, check the National Weather Service heat index. Carry water, use shade and take air-conditioned breaks. If smoke is present, check AirNow's official Air Quality Index before prolonged outdoor exercise.

In winter, check wind-chill and ice warnings before a long walk. Wear insulated, water-resistant footwear and shorten lakefront plans during severe conditions. Allow more time on slippery streets and platforms.

Check the Park District beach dashboard before entering the water. Swim only at an open beach during guarded hours. Keep routine vaccinations current, and identify a suitable clinic or hospital before travelling with a specific medical need.

Call 911 for police, fire or a medical emergency. Give the street address, nearest intersection, station name or lakefront landmark; Chicago's long shoreline and multi-level centre make precise location important.

Call 311 for non-emergency city services and information. Do not use 311 when immediate help is required.

On CTA, use the train intercom, platform help point or speak to station staff when available. Follow operator instructions during service disruption and move away from the platform edge.

At the lake, alert a lifeguard first when one is present and call 911. Do not enter rough water to attempt an untrained rescue. Weather and public-safety alerts are available through official city and National Weather Service channels.