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A violently rotating column of air in contact with both the surface of the Earth and a cumulonimbus cloud. Safety measures include seeking shelter in a basement or an interior room without windows on the lowest floor.

A tropical cyclone with sustained winds of at least 74 miles per hour. Safety measures include evacuating if advised, boarding up windows, and having an emergency kit ready.

A storm that produces hail, which are balls or irregular lumps of ice. Safety measures include seeking shelter to avoid injury from hail, protecting vehicles, and staying away from windows.

A period of excessively hot weather, which may accompany high humidity. Safety measures include staying hydrated, avoiding strenuous outdoor activities, and using fans or air conditioning.

A type of winter storm characterized by freezing rain that leaves at least a quarter-inch of ice on surfaces. Safety measures include avoiding travel, keeping away from power lines, and having an emergency kit.

Severe snowstorm with winds exceeding 35 mph and visibility less than 0.25 miles for at least 3 hours. Safety measures include staying indoors, keeping dry, and avoiding travel.

An overflow of water that submerges land that is usually dry. Safety measures include moving to higher ground, avoiding walking or driving through flood waters, and following evacuation orders.

An unplanned, uncontrolled fire spreading through vegetative fuels, often in rural areas. Safety measures include creating defensible space around property, following evacuation orders, and avoiding ignition sources during dry conditions.

An extended period of deficient rainfall relative to the statistical multi-year average for a region. Safety measures include water conservation, fire risk awareness, and following water-use restrictions.