A person walking a dog along the Chicago lakefront. (WTTW News)

Temperatures reached a high of 57 degrees in Chicago on Thursday. As the city experiences an El Nino year, 2024 is seeing temperatures about 1 to 3 degrees above average.

Emissions rise from the smokestacks at the Jeffrey Energy Center coal power plant as the suns sets Sept. 18, 2021, near Emmett, Kan. (AP Photo / Charlie Riedel, File)
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Environmental and public health groups hailed the new Environmental Protection Agency rule finalized Wednesday as a major step in improving the health of Americans, including future generations. 

Honey locust seed pods blanket the ground in Albany Park, late January 2024. (Patty Wetli / WTTW News)

In a winter that hasn’t seen much in the way of snow, honey locust pods are picking up the slack in terms of blanketing lawns, parkways and sidewalks, and piling inches deep along curbs.

The Field Museum’s rare copy of John J. Audubon’s “Birds of America” is now on public view. (Patty Wetli / WTTW News)

The Field Museum’s rare copy of John J. Audubon’s “Birds of America” is now on public display, as part of an exhibit that doesn’t shy away from Audubon’s complicated legacy.

Woodstock Willie got an assist from meteorologist Tom Skilling. (Patty Wetli / WTTW News)

Neither groundhog saw its shadow, indicating an early spring.

Tapeko, one of Brookfield Zoo’s bottlenose dolphins, gets a big welcome home from Melissa Zabojnik, a senior animal care specialist. (Jim Schulz / CZS-Brookfield Zoo)

The zoo’s seven bottlenose dolphins will spend the next six weeks getting used to their new and improved digs.

 The moon covers the sun during a solar eclipse in Piedra del Aguila, Argentina, Monday, Dec. 14, 2020. (AP Photo / Natacha Pisarenko)
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The alignment of sun, earth and moon will plunge the city into darkness, and as long as the maddeningly unpredictable Northeast Ohio weather cooperates, people will view a spectacle that lasts just under four minutes but occurs only three times in a 638-year span above the city.

(Andrea Piacquadio / Pexels)
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Advocates say the proposed ordinance aims to combat climate change and reduce the amount of greenhouse gas emissions, while critics believe it would increase cost and risk reliability.

Alaina Harkness, the executive director of the water tech nonprofit Current, appears at a Chicago news conference on Jan. 30, 2024, with Gov. J.B. Pritzker. (Dilpreet Raju  / Capitol News Illinois)

The U.S. National Science Foundation awarded the grant to Current Innovation NFP, a nonprofit “innovation hub” whose mission is to “solve pressing water challenges caused by climate change and pollution.” 

A volunteer pulls a freshwater mussel from the Chicago River, Dec. 12, 2023. (Patty Wetli / W

Freshwater mussels can be a river system’s best friend, but they’re missing from long stretches of the Chicago River. Here’s a look at one effort to reintroduce them.

Arnold Randall in a “Chicago Tonight” interview that aired Oct. 18, 2022. (WTTW News)
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From catching walleye to bringing restoration work out of the dark ages to passage of a groundbreaking tax hike, Arnold Randall reflects on his 13 years as general superintendent of the Forest Preserve District of Cook County.

The Doomsday Clock was set at 90 seconds to midnight in 2023 and this year. (Anna Moneymaker / Getty Images / FILE)

On Tuesday, the clock was again set at 90 seconds to midnight — the closest to the hour it has ever been, according to the Bulletin of the Atomic Scientists, which created the clock in 1947.

Adult spotted lanternfly. (U.S. Department of Agriculture)

Experts said the pest’s eggs, which will hatch in spring, are able to withstand the recent arctic blast.

(National Weather Service)

Sundogs form when waves of sunlight pass through ice crystals suspended in clouds. They resemble rainbows or halos, or can even resemble a second sun.

Snow blankets Chicago, Jan. 12, 2024. (Patty Wetli / WTTW News)
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CPS announced classes will be in session for all students Wednesday as the frigid temperatures the city has seen this week have begun to dissipate.

(Pixabay)

The Chicago region remains under a wind chill warning Tuesday morning as bitterly cold temperatures persist.