A new USC study finds that relaxing Los Angeles’ outdated tree planting guidelines could significantly expand urban tree ...

The National Weather Service described the disaster as "a once-in-a-generation to once-in-a-lifetime" event, warning that the worst may still be ahead.

A global study of 270,000 plant species reveals how climate, soil, and ancient geography shape where plants grow and live.

When planning your yard or garden, you likely focus on the what and the where. After all, a beautiful plant in a prime ...

More parts of Orange County are identified where residents might be required to start taking measures to protect their homes.

The US is set to see a brutal "dual peak" in the 2025 allergy season, with millions set to suffer as a result of the ...

Cities with first-time fire zone designations include Santa Monica, La Cañada-Flintridge, South Pasadena, Alhambra, ...

The state fire marshall says the maps are meant to help cities and counties plan new communities and should not affect the ...

Cal Fire’s refreshed maps show a large increase in areas considered hazardous: “High” and “very high” hazard zones have grown ...

All told, the size of orange and red patches on the new maps is 3,626 square miles — an area nearly twice the size of ...

With a few notable areas where the orange and red tide receded, like the hills above Berkeley and Oakland, territory deemed ...