Tomball firefighters and other area departments arrived at the fire around 2pm and elected to evacuate a mobile home park off Sugarberry Way as a precaution.
Officials were still battling the flames into the night. It destroyed several acres near the Inverness Estates subdivision, but no homes were damaged. It was unknown if the evacuated residents were allowed to return home Saturday.
That was the second grass fire Harris County officials had to deal with Saturday.
The first was a grass and woods fire on Moonshine Hill Rd. in Humble near F.M. 1960 East.
Crews from several local agencies were called to the fire around 1pm. They got it under control within a couple hours.
Officials said that fire burned between an acre and an acre and a half of land.
Another grass fire broke out around 8pm on Old Galveston Rd. in the Clear Lake area.
The bulk of that fire was knocked down quickly, officials said. It was close to an apartment complex, but authorities said the nearby buildings were not in danger.