A Freeze Warning has been issued for parts of Arizona. PHOENIX - It will be a cold morning in the Valley before temps warm up to the low-70s on Wednesday. Temps will be in the 40s early in the morning ...

Environmentalists say monarch populations are shrinking because of warmer temperatures from brought on by climate change, ...

U.S. wildlife officials announced a decision Tuesday to extend federal protections to monarch butterflies after years of ...

U.S. officials decided to extend protections to monarch butterflies after warnings from environmentalists that populations ...

A weak weather system will pass to the north of Arizona on Thursday night, and temperatures will drop again across the state ...

Arizona Attorney General Kris Mayes says the merger would've had a ripple of damaging effects to Arizona's economy, loss of jobs, and leaving residents in rural areas without basic necessities.

The official low at the airport this morning was 23, a hard freeze for our first official freeze of the season. Monica Cortez ...

A combination of strong winds, low relative humidity, and dry fuels can contribute to extreme fire behavior. Any fires that ...

After a cool to cold morning, seasonable daytime temperatures return today with widespread above normal temperatures Thursday through early next week.

After a fairly widespread freeze Wednesday morning, we're now tracking mainly mid to upper 30s to start Thursday.

Millions of Americans should prepare for an Arctic blast that will blanket much of the country in below-freezing temperatures ...

The United States is bracing for a dramatic "temperature roller coaster" this winter, according to updated forecasts from ...