Ozone: Summer days tend to see higher concentrations of this gas, which is harmful when it forms near the ground. Hot and sunny conditions accelerate that process. Ground-level ozone irritates the ...

With the first official 100-degree reading in 13 years on Tuesday, Philadelphia broke a 100-year-old record for a daily high-temperature. And another might fall Wednesday, after what could be a second ...

Earth is hotter than it has been in 125,000 years, scientists say, and Las Vegas continues to break temperature records. The ...

Opinion: Hogan Lovells' Sean Marotta and Danielle Desaulniers Stempel explain how the Supreme Court's new two-step rule to determine the venue for Clean Air Act cases will work.

The end of the financial year is coming up fast and eBay has wasted no time in slashing prices and dropping some amazing deals across home, tech, sport, clothing, shoes, accessories and much more.

Studies like this one demonstrate the interconnectedness of our planet. Researchers make stunning discoveries during 70-day ...

Humidity in Houston is often discussed due to its impact on how the weather feels, with humidity referring to the water vapor ...

Earth is hotter than it has been in 125,000 years, scientists say, and Las Vegas continues to break temperature records. The extreme heat claimed more ...

Dr. Todd Ellerin of South Shore Health discusses the dangers of prolonged heat and humidity, offering practical tips to stay ...

The precautions in Wayne come after more than 160 people were overcome by the heat at graduation ceremonies in Paterson.

Happening now: Unpleasant muggy morning with lots of sunshine. Temperatures may climb even faster than Monday. Afternoon heat ...

After one of the warmest June mornings in records dating to 1872, Philadelphia may experience its first 100-degree reading in ...