Here's what experts say is turning Southern California's speedy wildfires into a deadly urban conflagration that is defying the calendar.

Experts say the winter grassland fire that blew up along Colorado’s front range was rare.

Many Americans aching for normalcy as pandemic restrictions end are looking forward to traditional Fourth of July fireworks.

But wildfire in California is a much more complex people-stoked witchs brew. California has a really flammable ecosystem, said University of Colorado fire scientist Jennifer Balch. When people moved into California, they brought invasive grasses, such as cheatgrass and common Mediterranean grass, that outcompeted native grasses and burn more quickly. About 97% of the fires in coastal California are started by people, either on purpose or accidentally, a study by Balch found. ___The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institutes Department of Science Education.