Drought declarations are not just based on rain. They also consider soil moisture, stream flow, and groundwater, which tends to lag behind rain.

Under a Code Orange, air quality may be unhealthy for vulnerable groups such as children, people with asthma, people with heart or lung disease, and older adults.

Under a Code Red, air pollution concentrations are considered unhealthy for the general population and outdoor activity should be avoided.

Every four years, PECO makes a plan to buy electricity for its customers. Climate activists want the utility to do something different the next time around.

City departments in Philadelphia are urged to allow employees who can work indoors to do so. Public pools will also be closed for the day.

Wildfires continue to rage across Canada, with hundreds burning and more than half out of control.

A new microreactor being developed at the Idaho National Laboratory will be small enough to put on a tractor trailer and nimble enough to send to a disaster site.

The legislation would direct DNREC to evaluate the potential benefits and roadblocks of offshore wind.

Homer City Generating Station will shut down by July due to competition from cheap natural gas and pollution upgrade costs. The plant was a major air polluter in its heyday.

The celebrated Bright Solar Futures program went on, but without its key hands-on element.

Neurologists say the increasing effects of climate change could impact health outcomes, including headaches.

To protect yourself and your family, avoid going outside if possible and close windows and doors.

Here's what you need to know about the wildfire smoke and air quality situation in Philadelphia, Pennsylvania, New Jersey, and Delaware.

It’s Pennsylvania’s second pilot to provide new A/C units and repairs to people who already received LIHEAP or weatherization assistance in the past year.

They are increasingly targeting corporations, asset managers, and retirement funds with both moral suasion and financial muscle.