Extreme Heat Warning

until FRI 8:00 PM MST, Marble and Glen Canyons, Grand Canyon Country

Extreme Heat Warning

until SUN 8:00 PM MST, Northwest Plateau, Lake Havasu and Fort Mohave, West Pinal County, East Valley, Gila River Valley, Yuma County, Deer Valley, Scottsdale/Paradise Valley, Northwest Pinal County, Cave Creek/New River, Apache Junction/Gold Canyon, Gila Bend, Buckeye/Avondale, Central La Paz, Northwest Valley, Sonoran Desert Natl Monument, Fountain Hills/East Mesa, Southeast Valley/Queen Creek, Aguila Valley, South Mountain/Ahwatukee, Kofa, North Phoenix/Glendale, Southeast Yuma County, Tonopah Desert, Central Phoenix, Parker Valley

until THU 10:00 PM MST, Mohave County

from THU 8:15 PM MST until THU 10:15 PM MST, Cochise County

Air Quality Alert

until THU 9:00 PM MST, Maricopa County

National Guard troops arriving at the border

Published April 11, 2018 3:06 PM MST

Published April 11, 2018 3:06 PM MST

TUCSON, Ariz. (KSAZ) - Hundreds of National Guard members have started to arrive at the United States-Mexico border.

Thus far, the Governors of Arizona, New Mexico and Texas have committed 1,600 guard members. FOX 10's Steve Krafft reports.

>>VIDEO: National Guard news conference