NEW : Critical weather is expected in Texas , where fires destroyed hundreds of homes . Firefighters in Arizona have been stymied by strong winds , high temperatures , low humidity . Wind will lessen , but will increase as the week goes on . People living in Sierra Vista were ordered to leave Sunday while firefighters conducted burn-out operations in an attempt to stop the fire moving that way , CNN 's Thelma Gutierrez reported from the area . A company spokesman said Sunday was a ` ` hard day '' in southern Arizona .
NEW : Critical weather is expected in Texas , where fires destroyed hundreds of homes . Firefighters in Arizona have been stymied by strong winds , high temperatures , low humidity . Wind will lessen , but will increase as the week goes on . A company spokesman said Sunday was a ` ` hard day '' in southern Arizona .