* Trump calls gunman 'very, very sick guy'
* One of victims survived Las Vegas shooting-friend
* Area now threatened by wildfire
* 75,000 homes in the area evacuated
* (Recasts throughout, adding comments from Trump, details)
By Eric Thayer
THOUSAND OAKS, Calif., Nov 9 (Reuters) - U.S. President Donald Trump said on Friday the gunman who killed 12 people in a crowded South California bar this week was a "very, very sick guy" and speculated the former U.S. Marine combat veteran could have been suffering from post-traumatic stress disorder.
"He is a very sick puppy," Trump said of the gunman, speaking at the White House before leaving on a trip to Paris.
Victims of Wednesday night's rampage in the city of Thousand Oaks included an 18-year-old freshman student at Pepperdine University, a security guard at the Borderline, a graduate of California Lutheran University and a Marine Corps veteran.
Ian David Long, 28, walked into the Borderline Bar and Grill, which was packed with dancing college students, and opened fire, fatally shooting 12 people before apparently killing himself, law enforcement officials said.
The FBI was seeking a motive for the country's latest mass shooting.
Even as Thousand Oaks, a suburb 40 miles (64 km) northwest of downtown Los Angeles, mourned the dead the city faced a fresh threat on Friday as wildfires raged in the area, forcing thousands of people from their homes.
Ventura County Sheriff Geoff Dean told reporters on Thursday that Long may have suffered from PTSD.
"He was a Marine, he was in the war, he served time, he saw some pretty bad things," Trump said. "And a lot of people say he had PTSD and it's a tough deal."
Richard Berge, who lived near Long and looked after his mother's dogs, told Reuters she had told him earlier this year she worried her son might take his own life but did not fear he would hurt her.
The Thousand Oaks massacre took place less than two weeks after a man shot dead 11 worshippers at a Pittsburgh synagogue, fueling the debate over gun ownership in America.
One of the dead, Telemachus Orfanos, had survived the mass shooting at a country music concert in October 2017 in Las Vegas that killed 58 people, the worst such incident in modern U.S. history, ABC News said, citing a friend.
It was time for politicians to act, Orfanos' mother, Susan Schmidt-Orfanos, told ABC News.
"I don't want prayers. I don't want thoughts," she said. "I want gun control and I hope to God nobody else sends me any more prayers."
The wildfire that started on Thursday had destroyed some homes on the outskirts of Thousand Oaks and forced the mandatory evacuations of 75,000 people, as well as closing some highways. A large plume of smoke grew on the horizon to the northeast of the city.
At a press conference Linda Parks, a Ventura County supervisor, whose district includes Thousand Oaks, noted the area was dealing with both the shooting and the fires.
"We are still reeling, but we are also very resilient," she said.
The fire near Thousand Oaks was one of three fast-moving wildfires burning in California on Friday morning.Fierce winds were expected to keep fanning the flames during the day.
Although mass shootings have become part of the fabric of modern American life, it was a shock for this city, a sprawling suburb of 127,000 people that was named the third safest city in the United States for 2018 by the Niche research company.
Heather Wynalda, 47, a resident of Conejo Valley, which is a few miles to the west of Thousand Oaks, said her brother's home had been consumed by fire, but he and his family were safe.
"It's just devastating," she said via Facebook messenger. "This community pulled together so beautifully in the midst of yesterday's shooting... and today, it is being frantically scattered in an effort to escape the fires."
Evacuation centers have been set up in Thousand Oaks, including a teen center where during Thursday frantic parents waited for news of their children after shooting.
California Lutheran University, which just the day before canceled classes, announced that although the school had not been ordered to evacuate because of the fire, it would close Friday and was "monitoring the situation closely."
Pepperdine University, which had held a prayer service in Malibu following the shooting, announced Friday that it was closing its Malibu and Calabasas campuses due to wildfires.
(Additional reporting by Roberta Rampton in Washington, Bernie Woodall in Ft. Lauderdale, Florida, Dana Feldman in Marina del Rey, California, and Brendan O'Brien in Milwaukee Writing by Nick Carey Editing by William Maclean and Frances Kerry)
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