Secretary of State Rex Tillerson Rex Wayne TillersonGary Cohn: 'I haven't made up my mind' on vote for president in November Kushner says 'Alice in Wonderland' describes Trump presidency: Woodward book Conspicuous by their absence from the Republican Convention MORE on Wednesday thanked Mexico for offering assistance in the wake of Tropical Storm Harvey, as devastating floods leave Texas reeling.

"I particularly want to thank the government of Mexico for its offer of assistance to the state of Texas," Tillerson said during a joint press conference with Mexican Secretary of Foreign Relations Luis Videgaray Caso.

"They've offered a wide range of assistance, coordinating with the governor down in Texas and also through [the Federal Emergency Management Agency]. It is very generous of Mexico to offer their help at this very challenging time for our citizens down in Texas and now moving towards the border of Louisiana as well," he continued.

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Mexico offered to provide food, water, boats and a long list of other items after tens of thousands of people were displaced from their homes in Houston and other parts of southeastern Texas due to rising water levels.

"We are neighbors. We are friends, and that is what friends do," Caso replied.

President Trump and Tillerson have not directly accepted Mexico's offer, but Texas Gov. Greg Abbott (R) on Wednesday said he would welcome the help, The Dallas News reported.

On Sunday in a statement, Mexico offered assistance while also responding to Trump's tweets over the weekend that insisted it would pay for a wall along the southern U.S. border.

"The Mexican government ... expresses that it has offered to provide help and cooperation to the U.S. government in order to deal with the impact of this natural disaster — as good neighbors should always do in trying times," the statement said.

On Wednesday, Trump also repeated his promise to renegotiate the North American Free Trade Agreement (NAFTA) during a speech on tax policy in Missouri, adding that "Mexico is not happy" with his key campaign pledge. He did not mention their offer of assistance, which is still waiting for a response from the president.

Mexico's olive branch comes at a rocky time for the U.S.-Mexico relationship, as Trump vows to build the border wall and crack down on immigration.

Texas, which shares a border with Mexico, would largely receive the offered aid.