More Environment U.S. Stories

Learning to Program a Driverless Car at the UA

A 10-week summer course meant to encourage students to continue studies in research-based graduate programs.

Rescues Highlight Danger of Flash Floods in Catalina Mountains

Multiple helicopter rescues have taken place during recent weekends when floods stranded visitors.

Advocate Group 'Cautiously Optimistic' About Arizona Monument

Ironwood Forest National Monument's supporters are trying to preserve the protected area.

Tucson Sets July Rainfall Record, 2nd-Highest Monthly Total

July's rain total was higher than average rainfall for an entire summer rain season.

Mobile Unit Looks to Fight Treated Wastewater's 'Yuck' Reputation

Facility fits in a commercial truck trailer, and will be used as a public exhibit to build confidence in reclaimed drinking water.

Monsoon Brings Danger of Flash Flooding to Arizona

Meteorologist: Deadly event near Payson is an example of flash-flood dangers.

Parks Raising Price of Lifetime Pass for Seniors

The National Parks service will increase the fee from $10 to $80 in August.

Containment a Struggle on Burro Fire

Fire managers state need to be thorough and cautious before declaring containment, now at 11 percent.

Burro Fire Grows, Helped by Rugged Terrain, Weather

Similar conditions allowed fire to grow by 9,000 acres Sunday.

2017 Sees Hottest June on Record in Tucson

Average temperature of 89.7 degrees is the seventh hottest month on record.

Burro Fire Grows to 14,000 Acres, Prompts Closures and Evacuations

Flames were fanned by a storm system moving into the area, causing rapid growth on Sunday

Burro Fire Indicator of Extreme Dry Conditions, Official Says

Those celebrating Independence Day should be cautious due to abundance of dry fuels for wildfire.

Incoming Storm Could End Heat Wave

A storm system heading for Tucson means temperatures could get back to normal.

Fire Burns Buildings in Sonoita, Prompts Evacuations

The Encino Fire has burned 1,300 acres and eight buildings, according to fire officials.

Tributary Projects Aim to Improve Health of San Pedro River

Watershed work aims for increased flows and health of the undammed river.

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