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HOUSTON The first freeze this fall may occur north of Houston.

A freeze warning is in effect for Grimes, Montgomery, Polk, San Jacinto, Trinity, Walker and Washington counties.

By 3 to 5 a.m. temperatures in these locations may fall below 32 degrees and won t get above freezing until 8 a.m.

Tender vegetation is most at risk; bring those plants in for the evening. Small pets that are not used to the cold should also spend the night in an enclosed, covered location.

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