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The Lake Pontchartrain Causeway Bridge is closed after dense fog caused multiple car crashes on Tuesday, Dec. 17, 2024. (Brett Duke/The New Orleans Advocate via AP)

The Lake Pontchartrain Causeway Bridge is closed after dense fog caused multiple car crashes on Tuesday, Dec. 17, 2024. (Brett Duke/The New Orleans Advocate via AP)

Disabled vehicles and response vehicles are seen on the Lake Pontchartrain Causeway, which spans 24 miles over the lake, after a pileup due to morning fog in New Orleans, Tuesday, Dec. 17, 2024. (AP Photo/Gerald Herbert)

Disabled vehicles and response vehicles are seen on the Lake Pontchartrain Causeway, which spans 24 miles over the lake, after a pileup due to morning fog in New Orleans, Tuesday, Dec. 17, 2024. (AP Photo/Gerald Herbert)

Disabled vehicles and response vehicles are seen on the Lake Pontchartrain Causeway, which spans 24 miles over the lake, after a pileup due to morning fog in New Orleans, Tuesday, Dec. 17, 2024. (AP Photo/Gerald Herbert)

Disabled vehicles and response vehicles are seen on the Lake Pontchartrain Causeway, which spans 24 miles over the lake, after a pileup due to morning fog in New Orleans, Tuesday, Dec. 17, 2024. (AP Photo/Gerald Herbert)

Disabled vehicles and response vehicles are seen on the Lake Pontchartrain Causeway, which spans 24 miles over the lake, after a pileup due to morning fog in New Orleans, Tuesday, Dec. 17, 2024. (AP Photo/Gerald Herbert)

Disabled vehicles and response vehicles are seen on the Lake Pontchartrain Causeway, which spans 24 miles over the lake, after a pileup due to morning fog in New Orleans, Tuesday, Dec. 17, 2024. (AP Photo/Gerald Herbert)

Disabled vehicles and response vehicles are seen on the Lake Pontchartrain Causeway, which spans 24 miles over the lake, after a pileup due to morning fog in New Orleans, Tuesday, Dec. 17, 2024. (AP Photo/Gerald Herbert)

Disabled vehicles and response vehicles are seen on the Lake Pontchartrain Causeway, which spans 24 miles over the lake, after a pileup due to morning fog in New Orleans, Tuesday, Dec. 17, 2024. (AP Photo/Gerald Herbert)

Disabled vehicles and response vehicles are seen on the Lake Pontchartrain Causeway, which spans 24 miles over the lake, after a pileup due to morning fog in New Orleans, Tuesday, Dec. 17, 2024. (AP Photo/Gerald Herbert)

Disabled vehicles and response vehicles are seen on the Lake Pontchartrain Causeway, which spans 24 miles over the lake, after a pileup due to morning fog in New Orleans, Tuesday, Dec. 17, 2024. (AP Photo/Gerald Herbert)

Disabled vehicles and response vehicles are seen on the Lake Pontchartrain Causeway, which spans 24 miles over the lake, after a pileup due to morning fog in New Orleans, Tuesday, Dec. 17, 2024. (AP Photo/Gerald Herbert)

Disabled vehicles and response vehicles are seen on the Lake Pontchartrain Causeway, which spans 24 miles over the lake, after a pileup due to morning fog in New Orleans, Tuesday, Dec. 17, 2024. (AP Photo/Gerald Herbert)

Disabled vehicles and response vehicles are seen on the Lake Pontchartrain Causeway, which spans 24 miles over the lake, after a pileup due to morning fog in New Orleans, Tuesday, Dec. 17, 2024. (AP Photo/Gerald Herbert)

Disabled vehicles and response vehicles are seen on the Lake Pontchartrain Causeway, which spans 24 miles over the lake, after a pileup due to morning fog in New Orleans, Tuesday, Dec. 17, 2024. (AP Photo/Gerald Herbert)