SAN ANTONIO - The City of San Antonio held a press conference Thursday afternoon, and officials warned residents to avoid traveling over the weekend in the wake of Hurricane Harvey.

The storm was upgraded to a hurricane Thursday morning, and it is expected to bring 8-15 in. of rain to the San Antonio area over the weekend.

San Antonio Mayor Ron Nirenberg said the city is prepared to host evacuees from the gulf region.

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A staging area for out-of-town first responders is set up at the Freeman Coliseum.

All people seeking shelter are being asked to check in at 200 Gembler Rd. After they have been checked in and processed, Bexar County said then and only then will they be directed to a shelter within the county.

Local emergency crews are preparing 25 ambulances and three 'am-buses' to aid evacuees.

The city is also asking people to report low water crossings without barriers by calling 207-SAPD.

For all emergencies, dial 911.

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Residents are encouraged to have enough food and water for three days on hand, as well as any necessary medications.

Official City of San Antonio and Bexar County communications channels:

San Antonio area residents are also encouraged to download the Ready South Texas app to stay informed on safe weather routes and emergency conditions.