The embassy said today in a statement that "our governments have expressed their continued solidarity in the face of natural disasters that have ravaged both our countries."
The Mexican government said Wednesday it was sending 30 tons of bottled water and mosquito repellent to Puerto Rico.
The administration of President Donald Trump had been criticised for what some saw as a tardy response to the hurricane, which killed about 34 people directly and indirectly.
Some media outlets had portrayed Mexico's aid offer as slap in the face to the Trump administration, with which Mexico has had a rocky relationship.