Two hikers were rescued in Arizona Saturday afternoon, and officials say the pair failed to bring enough water as excessive heat scorches the Southwest.

First responders were called to Catalina State Park, located at the base of the Santa Catalina Mountains in Tucson, after the pair of hikers wandered off trail, Golder Ranch Fire District wrote on Twitter.

Officials said the hikers, neither of whom were publicly identified, were found without water.

The fire district urges hikers to stay on trail, bring plenty of water and start hiking early before the heat spikes. 

CALIFORNIA HIKERS DISCOVER REMAINS ON MOUNT BALDY AFTER SEARCH RESUMES FOR JULIAN SANDS

ambulance and fire truck at park

First responders found the two hikers off trail and without water at Catalina State Park in Tucson, Arizona, on Saturday afternoon, officials said. (Golder Ranch Fire District)

"Keep in mind temperatures are dangerously hot now through this upcoming week," fire officials said.

moutain in Catalina State Park

Catalina State Park is located at the base of the Santa Catalina Mountains in Tucson, Arizona. Two hikers were rescued Saturday afternoon after they were found off trail and without water, officials said. (Education Images/Universal Images Group via Getty Images)

The National Weather Service in Tucson issued an excessive heat warning through Tuesday evening for most of Southeast Arizona. Over the weekend, the temperature at Tucson International Airport had hit 111 degrees.

Hot temperatures have been expanding across the Southwest, with parts of Texas seeing above average temperatures for the 12th straight day.

SWELTERING TEXAS HEAT WAVE SCORCHES SOUTHERN CITIES, BRINGING TRIPLE-DIGIT TEMPERATURES

On Friday, a 31-year-old Florida man and his 14-year-old stepson died in Big Bend National Park in Texas after hiking in extremely hot conditions, according to park officials.

The teen had become ill on the Marufo Vega Trail around 6 p.m. and lost consciousness as temperatures hit 119 degrees.

An entrance sign for Big Bend National Park

A 31-year-old Florida man and his 14-year-old stepson died Friday in Big Bend National Park in Texas after hiking in extremely hot conditions, according to park officials. (Education Images/Universal Images Group via Getty Images)

The teen’s 21-year-old brother attempted to carry him back to the trail head as the stepfather left the two to go back to the vehicle and find help. The stepfather’s vehicle was later found crashed over an embankment at the Boquillas Overlook.

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Both the 14-year-old and the stepfather were pronounced dead when officials arrived at the scenes.

FOX News’ Greg Wehner contributed to this report.