Video captured by a resident of the village of Crooked Tree in northern Belize shows a tornado or waterspout spinning towards the settlement.
The tornado destroyed one home and several cashew trees on nearby plantations.
Amanda De Monte, a meteorologist at The Weather Network, says it's not unusual for tropical storms to spawn tornadoes because landfall creates the necessary wind shear.
Harvey blasted Belize with sustained winds of nearly 100 km/h and was expected to dump up to 150 mm of rain on the tropical country.
Harvey was since downgraded to a tropical depression and has dissipated over Mexico's Yucatan Peninsula. Parts of southeastern Mexico could still see heavy rain and gusting winds.
Meanwhile, tropical storm Irene formed off the Lower Antilles Saturday night. Irene became the first hurricane of the Atlantic season early Monday morning.
With nine named storms in the books so far, this has been one of the busiest starts to an Atlantic hurricane season, De Monte says.
Visit The Weather Network's Tropical Storm Center to stay on top of all the activity in the Atlantic and eastern Pacific.