An unusually cold air mass had a significant impact on Southeast Arizona.

Frost/Freeze in TUCSON METRO AREA, ARIZONA
From 02-FEB-11 22:00:00 to 03-FEB-11 18:00:00 (MST-7)
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Broadcast Media

Temperatures dropped into the mid to upper teens across the Tucson area overnight resulting in numerous burst water pipes. A water pipe at a main Metro Water location froze, leaving almost 30 residences and businesses without water on the northwest side. More than 200 customers in Tucson reported frozen or burst water pipes. In all, at least 2000 residents and businesses were without water at some point during the day. AAA saw a 20% increase in local calls on Thursday, mostly about dead car batteries. Davis-Monthan Air Force Base had several buildings damaged by flooding frozen fire sprinkler pipes, which resulted in the buildings being closed for safety reasons. The intersection of Grant Road and Stone Ave. was also closed due to a burst water main that was causing slick road conditions. The Reid Park Zoo was also closed due to numerous broken water pipes.
Southwest Gas Company also could not meet natural gas demand, which resulted in about 14,000 Tucson customers being without heat.
In Green Valley, over $17,000 in damage was sustained at 11 Green Valley recreational centers due to broken sprinkler systems.
Untold numbers of plants, trees, and shrubs were also killed by the record cold, including the prized southern Arizona Saguaro Cactus.

Frost/Freeze in UPPER SAN PEDRO RIVER VALLEY, ARIZONA
From 02-FEB-11 22:00:00 to 03-FEB-11 18:00:00 (MST-7)
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Broadcast Media

Several communities across the Upper San Pedro River Valley suffered from frozen and burst water pipes as temperatures dropped into the single digits to low teens. In addition, 4500 Sierra Vista Southwest Gas customers lost their natural gas flow. Most of the damage was at Fort Huachuca where over 400 homes suffered from broken water pipes with more than 100 homes sustaining damage. About 40 outpost buildings had ceilings collapse due to broken water pipes. Sierra Vista Fire Department also responded to several fire calls related to space heaters and candles.
In Benson, the city received over 100 calls regarding burst water pipes. The San Pedro Terrace Apartments on Pearl Street and the Desert Road Inn suffered damage from burst pipes and had to be evacuated. Residents and guests were transported to Sierra Vista hotels. A water pipe burst in the Benson Middle School Library ceiling causing damage to the ceiling, carpets, and shelves. Books on the shelves sustained light damage. The Benson Visitors and Community Center, Benson Public Library, and Cochise College Benson Center also sustained damage.
The St. David School District reported damage to one boiler, the main fire raiser for the sprinkler system, broken pipes in the weight-room wall and one drinking fountain. School did not have to be canceled.

Extreme Cold/Wind Chill in GALIURO AND PINALENO MOUNTAINS, ARIZONA
From 02-FEB-11 22:00:00 to 03-FEB-11 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

There was an extended period with wind chill values at or below -20 degrees Fahrenheit across the higher elevations.

Extreme Cold/Wind Chill in CHIRICAHUA MOUNTAINS, ARIZONA
From 03-FEB-11 03:00:00 to 03-FEB-11 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

There was an extended period with wind chill values at or below -20 degrees Fahrenheit across the higher elevations.

Extreme Cold/Wind Chill in SANTA CATALINA AND RINCON MOUNTAINS, ARIZONA
From 02-FEB-11 22:00:00 to 03-FEB-11 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

There was an extended period with wind chill values at or below -20 degrees Fahrenheit across the higher elevations.

Frost/Freeze in UPPER GILA RIVER AND ARAVAIPA VALLEYS, ARIZONA
From 02-FEB-11 22:00:00 to 03-FEB-11 18:00:00 (MST-7)
Property damage: 300.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Temperatures dropped into the single digits across the Gila River Vally with wind chills dropping as low as -10 degrees. As a result, a water main line broke at Fifth Avenue and Second Street. More than 100 calls were received by Safford Utility in response to frozen pipes that later turned to broken pipes. Safford Fire Department responded to more than a dozen calls for malfunctioning sprinkler systems. Some businesses that received minor water damage were the Arizona Credit Union, the Veterans Administration Office and Thriftee Supermarket.
In Thatcher, the Fire Department responded to the Thatcher school where sprinkler systems and backflow preventers in several buildings burst.
Pima also had numerous water lines burst as a result of the cold. One pipe burst at the entrance to the Pima Fire Station. The Graham County Jail also had water damage sustained in the honor pod by a broken pipe.
Fire Departments in Safford, Thatcher and Pima also responded to fires involving space heaters and candles used to keep water pipes from freezing.

Cold/Wind Chill in TUCSON METRO AREA, ARIZONA
From 02-FEB-11 22:00:00 to 03-FEB-11 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Record cold resulted in two fatalities in the Tucson Metro Area. A woman in her late 30's was found dead in an alley near East Speedway and North Campbell Ave. A second woman was also found dead near East Grant and North Craycroft. An autopsy was performed.  Another person was also found lying out in the cold nearly frozen and was taken to the hospital with non-life threatening injuries.

Frost/Freeze in EASTERN COCHISE COUNTY BELOW 5000 FEET, ARIZONA
From 02-FEB-11 22:00:00 to 03-FEB-11 18:00:00 (MST-7)
Property damage: 0.50M
Crop damage: 0.00K
Reported by: Broadcast Media

Temperatures dropped to as low as 0 degrees across eastern Cochise County as several communities experienced frozen or burst water pipes. Most notably, Willcox received over 790 calls for frozen or burst water pipes. Damage was also done to Safeway when a pipe burst in the ceiling causing several ceiling tiles to collapse. The Willcox School District had a broken pipe in the wood shop room and a back flow preventer burst outside the wood shop causing minor water damage.
In Douglas, several businesses were closed due to broken pipes including; Chiricahua Community Health Center, Copper Queen Medical Associates, the Douglas Library and APS Energy. Douglas School District also canceled classes due to burst pipes. The worst damage was done to a home on Fourth Street when the pipes in the attic burst causing the ceiling to collapse and the home to be flooded.

Extreme Cold/Wind Chill in WHITE MOUNTAINS OF GRAHAM AND GREENLEE COUNTIES, ARIZONA
From 03-FEB-11 00:00:00 to 03-FEB-11 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

There was an extended period with wind chill values at or below -20 degrees Fahrenheit across the higher elevations.

Frost/Freeze in UPPER SANTA CRUZ RIVER AND ALTAR VALLEYS, ARIZONA
From 02-FEB-11 22:00:00 to 03-FEB-11 18:00:00 (MST-7)
Property damage: 0.50M
Crop damage: 0.00K
Reported by: Broadcast Media

The Upper Santa Cruz River Vally experienced numerous issues with broken water pipes as temperatures dipped into the upper single digits to mid teens. Robert Bracker Elementary School in Nogales was canceled due to broken pipes. An underground water line ruptured in the Monte Carlo neighborhood, where the road had to be dug up to replace the line. Also, an air release valve on a 16 inch pipeline that feeds the city water system from the Santa Cruz River burst, blasting water into the air. The Nogales Fire Department also responded to a two car collision caused by icy roads on Target Range Road. Four people were involved and two were injured and taken to the Holy Cross Hospital.
In Patagonia, an elderly resident had to be evacuated to her sister's house after the pipes in the ceiling burst causing drywall to fall.
Also, ranchers near Sonoita reported a water pump bursting causing a cattle tank with thousands of gallons of water to drain out.