AZTexos highway conditions are expected to deteriorate as the Arizona Department of Transportation (ADOT) assesses damage caused by a magnitude-7.8 earthquake in Mexico.

According to the USGS, the epicenter of the quake was located in northern Guerrero state, about 60 miles (105 kilometers) west of the US border with Mexico.

In the coming days, the US Department of Homeland Security (DHS) is warning residents in the northern border state to prepare to travel to other states.

In an advisory issued late Monday, the DHS noted that residents of the state of Oaxaca have been urged to prepare “for increased traffic in the area and potentially reduced access to services.”

The USGS warned that if the quake caused “any significant damage to infrastructure or transportation infrastructure,” it could affect transportation in the state.

The Mexican government has warned of “major damage” if the earthquake is felt in the region.