HOUSTON- Many undocumented immigrants in the Houston area fear for the future under Trump's immigration plan.

There are 1.5 million undocumented immigrants in Texas. Twenty-three percent of them shingle our roofs and build our cities, working in construction, restaurants and all manner of businesses, according to the Migration Policy Institute.

Local immigration law expert, Michael Olivas, said their impact is everywhere.

"Do jobs that others won’t do, pick crops that others won't harvest, and do work to bring many up, many of our children and to paint houses,” said Olivas.

Data shows 825,000 undocumented immigrants working here are mostly from Mexico. Some fear they’ll be deported by President-elect Donald Trump.

"After the border is secured and after everything gets normalized, we're going to make a determination on the people that you're talking about who are terrific people, they're terrific people but we are going to make a determination at that,” said Trump.

Olivassaid this is nothing new, and the Obama administration has deported thousands of undocumented immigrants.

"He is labeled as simply deporter and chief,” said Olivas.

Trump says the immediate targets will be undocumented felons.

Olivasserves as the interim president of the University of Houston Downtown. He said removing the undocumented students from our schools would have painful consequences to our country.

"Having youthful immigration, not only means these people are trained in our language and in our educational system and in our cultural system and in our citizenry, but they will support us in our old age,” said Olivas.