The victims were taken to local hospitals by helicopter, ambulances and a mobile mass casualty transportation vehicle, the fire department said.
After giving water to the person, the employee then called police.
A police officer cleans up the caution tape around the area of the Walmart parking lot where the tractor-trailer was discovered.
McManus initially called it a case of human trafficking and at the end of the conference said that this "is not an isolated incident".
Police are searching the area to find anyone who may have attempted to flee the scene.
Numerous people who survived the heat are in the hospital in serious or even critical condition, recovering from heat-related illnesses.
Hood told CNN that all of the bodies were of adult males, some of whom appeared to have suffered brain damage from the heat inside the truck. The driver is in custody and will be charged. They say it's a horrific human trafficking case.
The US Department of Homeland Security was investigating the discovery, he said. "This happens quite frequently under cover of night", McManus said.
McManus said that the store surveillance video showed a number of vehicles picking several people up from inside the trailer before authorities could arrive on the scene.
It was not immediately clear how many people made it off the truck alive, McManus said.
"Horrific scene overnight in San Antonio where a human smuggling attempt turned deadly", Doggett tweeted. I personally worked on a tragic tractor trailer case in Victoria, Texas in 2003 in which 19 people were killed as a result of the smugglers' total indifference to the safety of those smuggled and to the law. He said the people in the trailer would be reviewed by ICE agents to determine their immigration status.
Authorities did not say whether the rig was locked when they arrived, whether it was used to smuggle the occupants across the border into the US, or where it might have been headed.
For over a century, immigrants have looked to the United States as a beacon of hope and opportunity.
New entrant to the telecom sector Reliance Jio , now entered the feature phone market with its very first VoLTE feature phone. And JioPhone will be physically available to those who have pre-booked, on a first come first serve basis, September onwards.
With plenty of points to be won and lost, the title race is still very much on and Arsenal will be confident of bridging the gap. Defensively, Arsenal have improved since Shkodran Mustafi joined the club in the summer but there is still room for improvement.
So in as much as stakeholders are heavily spending on ads, their audience is also responding very well to what they are offering. In addition to this, there’s a wide variety of games which the platform offers to cater for all types of gamers.
He chose not to elaborate on the issue until the State Department's full statement regarding the Iran deal. Among those sanctioned were key backers of Iran's military and Islamic Revolutionary Guard Corps.
They edged out division rival the Pittsburgh Steelers, who came in 28th on the list with an estimated value of $2.25 billion. Alongside Adidas , the club are sponsored by other big companies such as Chevrolet and 20th Century Fox .
The Israeli army and news media say the assailant was shot, but it is not clear whether he or she was killed in the shooting. At least 47 Israelis and five foreign nationals have been killed in almost two years of such attacks.
China's imports of coal totaled 2.68 million tons in the first half of the year, down 74.5 percent from the previous year. Iron ore is among China's biggest imports from the North after it stopped buying coal this year due to the sanctions.
As the British Royals landed in Warsaw, Prince George and Princess Charlotte took people down memory lane with their ensembles. Offering her thanks for the gift, she turned to Prince William laughing and said: "We will just have to have more babies".
But he said he hasn't heard from them since then, and police told him that the calls came from an untraceable "burner" phone. Boogotti Kasino claims the dog was taken by Whitehead's "ex-bitch", and that he did not steal the animal.
Arm injury ends Djokovic's run at Wimbledon
Federer closed out the set in ideal fashion with an ace, his fifth of the set as his superior all-court game was clear to see. He had already summoned the doctor after just three games of the opening set. "I'm just thrilled right now".