The Crown Fountain in Millennium Park is pictured in a file photo. (Michael Izquierdo / WTTW News)

On Thursday, Chicago notched its first official 100-degree day since 2012 and tied a daily high set nearly 80 years ago, according to the National Weather Service.

Emperor penguin (Aptenodytes forsteri) pair on sea ice, Larsen B Ice Shelf, Weddell Sea, Antarctica. (Sergio Pitamitz / VWPics / AP)

Four out of five emperor penguin colonies analyzed in the Bellingshausen Sea, west of the Antarctic Peninsula, saw no chicks survive last year as the area experienced an enormous loss of sea ice, according to a new study.

(Michael Izquierdo / WTTW News)

Cooling centers and splash pads are open to help people cope with oppressive heat that will feel like 115 degrees.

(Patty Wetli / WTTW News)

This weekend, you’re invited to celebrate the 60th anniversary of the creation of Illinois’ state nature preserves by touring some of state’s rarest and most endangered landscapes. 

An aerial view of Barcelona, Spain, a city trialing various urban interventions to reduce the impact of soaring temperatures. (Manel Subirats / iStockphoto / Getty Images  via CNN)

Despite knowing about the perils of global warming for decades, many cities are proving to be woefully unprepared. Many solutions are based on time-tested design principles. Here are five things cities are doing right now to combat rising temperatures. 

Meet Brookfield Zoo's baby giraffe, born Aug. 19. (Jim Schulz / CZS-Brookfield Zoo)

The 6-foot, 130-pound calf was born Aug. 19, Brookfield Zoo announced Monday.

(Pixabay)

The National Weather Service has issued an excessive heat watch for Wednesday and Thursday, when the combination of high temperatures and oppressive humidity are expected to create dangerous conditions.

Flooding in Chicago. File photo. (WTTW News)

President Joe Biden issued a disaster declaration for Cook County. It comes more than a month after nearly 9 inches of rain flooded parts of Chicago, with the West Side hit particularly hard.

This Webb image shows a massive galaxy cluster called WHL0137-08, and at the right, an inset of the most strongly magnified galaxy known in the universe’s first billion years called the Sunrise Arc. (NASA / ESA / CSA)

Earendel is so distant that the starlight glimpsed by the Webb telescope was emitted within the first billion years of the universe. The universe is estimated to be about 13.8 billion years old.

A man walks through wildfire wreckage Friday, Aug. 11, 2023, in Lahaina, Hawaii. (Rick Bowmer / AP Photo)

Dogs trained to find bodies sniffed through piles of rubble and ash as stunned survivors of deadly wildfires that killed at least 80 people on the Hawaiian island of Maui took stock of their shattered lives and tried to imagine rebuilding from nothing.

Wildfire wreckage is shown Thursday, Aug. 10, 2023, in Lahaina, Hawaii. (Rick Bowmer / AP Photo)

A flyover of historic Lahaina showed entire neighborhoods that had been a vibrant vision of color and island life reduced to gray ash. Block after block was nothing but rubble and blackened foundations. Boats in the harbor were scorched, and smoke hovered over the town.

People watch as smoke and flames fill the air from raging wildfires on Front Street in downtown Lahaina, Maui on Tuesday, Aug. 8, 2023. (Alan Dickar via AP)

A wildfire tore through the heart of the Hawaiian island of Maui in total darkness Wednesday, reducing much of a historic town to ash and forcing people to jump into the ocean to flee the flames. At least six people died and dozens were wounded.

FILE - A man pours cold water onto his head to cool off on a sweltering hot day in the Mediterranean Sea in Beirut, Lebanon, July 16, 2023. (Hassan Ammar / AP Photo, File)

The United States is now at a record 15 different weather disasters that caused at least $1 billion in damage this year, the National Oceanic and Atmospheric Administration announced. It’s the most mega-disasters through the first seven months of the year since the agency tracked such things starting in 1980.

(WTTW News)

July is shaping up to be the warmest month on Earth in recorded history. But that heat isn’t just impacting the atmosphere — it’s having an impact on the ground beneath our feet.

Illinois has seen 107 tornadoes in 2023, according to the National Weather Service. That makes it the state with the most tornadoes this year. While Illinois holds this title, scientists caution the thought of adding the Prairie State to Tornado Alley.

Models and renderings showing plans for the renovated Shedd Aquarium. (WTTW News)

The renovation process, which is slated to begin in the coming weeks, is set to be divided into multiple phases that will extend across the next four years as the aquarium introduces new learning studios and exhibits and renovates its existing gardens and entrance points.