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Travel warning issued to 1 million across 9 states

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  Published in Travel and Leisure on Friday, October 31st 2025 at 0:37 GMT by Newsweek
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Travel Warning: Dense Fog in Nine States Prompting Travel Disruptions

The U.S. State Department has issued a new travel warning alert for travelers in nine states affected by dense fog, a rare but severe weather event that can significantly disrupt both air and ground transportation. The advisory, part of the department’s broader “Weather Hazards” alert system, urges residents and visitors to avoid non‑essential travel if possible and to remain vigilant for changes in flight schedules and roadway conditions.

States Under the Warning

According to the State Department’s travel alert page, the nine states currently impacted by the dense fog include Arkansas, Louisiana, Mississippi, Oklahoma, Texas, Tennessee, Missouri, Kentucky, and Alabama. In addition, Florida’s Gulf Coast is experiencing reduced visibility conditions that could affect travel in the area. The alert is effective through the end of the week, with the department noting that the fog could persist or shift later in the month.

The advisory lists the primary concerns for each state:

• Arkansas, Louisiana, Mississippi, Oklahoma, Texas, and Alabama – Airports have reported a high number of flight cancellations and delays due to visibility levels dropping below 1,000 feet.
• Tennessee, Missouri, and Kentucky – Ground transportation authorities warn of hazardous driving conditions, especially on interstates and rural roads where fog can obscure road signs.
• Florida’s Gulf Coast – Low visibility at airports such as Tampa and Fort Lauderdale has prompted airlines to postpone departures until the fog clears.

Impact on Flights and Airports

Local news outlets in Houston, Dallas, and New Orleans have highlighted how dense fog has led to a significant backlog of passengers. In Houston, the Texas Department of Transportation’s weather reporting center noted that visibility at George Bush Intercontinental Airport (IAH) fell to just 500 yards at peak times, forcing airlines to cancel flights en route to and from the region. Similarly, Dallas–Fort Worth International Airport (DFW) reported over 200 flight cancellations on Tuesday alone.

The FAA has issued temporary flight restrictions (TFRs) in several affected airspace corridors. According to the FAA’s Notice to Airmen (NOTAM) system, pilots must now rely on stricter instrument flight rules (IFR) procedures and are advised to use the latest radar and satellite imagery to navigate the low‑visibility zones. In addition, some smaller regional airports have closed for the day, prompting airlines to reroute flights to nearby hubs.

Ground Transportation Concerns

Highways across the Southern United States have seen a surge in accidents attributed to sudden fog formation. The Texas Department of Transportation (TxDOT) reports an uptick in collisions on I‑10 and I‑35. In Tennessee, the Department of Transportation issued a statement urging motorists to keep to the right lane, reduce speed, and use low beams to improve visibility. Kentucky’s highway officials have added temporary speed limits on portions of I‑75 to reduce crash risk.

Travelers planning to drive through fog‑prone areas are advised to check real‑time weather updates from the National Weather Service (NWS). NWS’s “Fog Forecast” tool provides minute‑by‑minute visibility data, allowing drivers to adjust routes or delay travel as needed.

How to Stay Informed

The U.S. State Department’s Travel Advisories portal includes a dedicated section for weather‑related warnings. By visiting https://travel.state.gov/alerts/, travelers can access the latest updates on fog conditions, air travel restrictions, and road safety advisories for each state. The portal also offers downloadable resources such as printable checklists for travelers who need to make last‑minute travel changes.

For those in the aviation sector, the FAA’s Air Traffic Control website hosts a “Fog and Low‑Visibility Conditions” page that explains how pilots and dispatchers handle operations during such events. Airlines often post updates on their social media accounts; for example, Southwest Airlines’ Twitter feed has posted a series of alerts about flight status changes in the affected states.

Why the Fog Is So Dangerous

Fog can create “blackout” conditions, where drivers cannot see the road beyond a few meters. On the air side, pilots rely heavily on instrument landing systems (ILS) to guide aircraft to the runway when visibility drops below visual flight rules (VFR) thresholds. In dense fog, the minimum visibility required for ILS Category I landings—typically 2,400 feet—may be difficult to achieve, leading to delays or diversions to alternate airports.

Health officials note that prolonged exposure to cold, damp conditions can also increase the risk of hypothermia and respiratory issues for travelers caught in the fog. Local authorities in the affected states are encouraging people to stay inside public buildings with heating and to avoid venturing outdoors until conditions improve.

Looking Ahead

The State Department’s travel warning remains active until the dense fog clears, which meteorologists predict could take anywhere from a few days to a week, depending on atmospheric conditions. While the weather is expected to ease gradually across most of the region, localized pockets of fog may persist into late October, especially in the Gulf Coast’s coastal areas.

Travelers and commuters in the affected states are urged to monitor official updates from the FAA, NWS, and their airlines. For those who need to travel for essential reasons, the Department of Transportation recommends booking flights with airlines that have robust weather‑handling protocols and considering alternate routes or modes of transportation if possible.

By staying informed and prepared, travelers can reduce the risk of delays and accidents while the dense fog continues to impact travel across nine states.