Natural hazards

a slide of large masses of snow and ice and mud down a mountain

a purified and potent form of cocaine that is smoked rather than snorted; highly addictive

a purified and potent form of cocaine that is smoked rather than snorted; highly addictive

(meteorology) rapid inward circulation of air masses about a low pressure center; circling counterclockwise in the Northern Hemisphere and clock…

a shortage of rainfall; "farmers most affected by the drought hope that there may yet be sufficient rain early in the growing season"

a shortage of rainfall; "farmers most affected by the drought hope that there may yet be sufficient rain early in the growing season"

shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity

(of volcanoes) pouring out fumes or lava (or a deposit so formed)

(of volcanoes) pouring out fumes or lava (or a deposit so formed)

applies to nonhuman mammals: a state or period of heightened sexual arousal and activity

(of volcanoes) pouring out fumes or lava (or a deposit so formed)

the occurrence of incoming water (between a low tide and the following high tide); "a tide in the affairs of men which, taken at the flood, lead…

the occurrence of incoming water (between a low tide and the following high tide); "a tide in the affairs of men which, taken at the flood, lead…

applies to nonhuman mammals: a state or period of heightened sexual arousal and activity

a wave of unusually hot weather

a severe tropical cyclone usually with heavy rains and winds moving at 63-136 knots (12 on the Beaufort scale)

a slide of a large mass of dirt and rock down a mountain or cliff

a slide of a large mass of dirt and rock down a mountain or cliff

applies to nonhuman mammals: a state or period of heightened sexual arousal and activity

shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity

the occurrence of incoming water (between a low tide and the following high tide); "a tide in the affairs of men which, taken at the flood, lead…

applies to nonhuman mammals: a state or period of heightened sexual arousal and activity

shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity

rain, hail, or snow hard and be very windy, often with thunder or lightning; "If it storms, we'll need shelter"

shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity

a purified and potent form of cocaine that is smoked rather than snorted; highly addictive

a cataclysm resulting from a destructive sea wave caused by an earthquake or volcanic eruption; "a colossal tsunami destroyed the Minoan civiliz…

a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt

a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt

a persistent and widespread unusual weather condition (especially of unusual temperatures); "a heat wave"

a raging and rapidly spreading conflagration

an earthquake at the sea bed

an instance of agitation of the earth's crust; "the first shock of the earthquake came shortly after noon while workers were at lunch"

a small earthquake

the wearing down of rock particles by friction due to water or wind or ice

a slight wind (usually refreshing); "the breeze was cooled by the lake"; "as he waited he could feel the air on his neck"

the normal brainwave in the electroencephalogram of a person who is awake but relaxed; occurs with a frequency of 8-12 hertz

the normal brainwave in the electroencephalogram of a person who is awake but relaxed; occurs with a frequency of 8-12 hertz

winds blowing from west to east and lying above the trade winds in the tropics

the wearing down of rock particles by friction due to water or wind or ice

the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse

an atmospheric phenomenon consisting of bands of light caused by charged solar particles following the earth's magnetic lines of force

the normal brainwave in the encephalogram of a person who is awake and alert; occurs with a frequency between 12 and 30 hertz

the normal brainwave in the encephalogram of a person who is awake and alert; occurs with a frequency between 12 and 30 hertz

a dry cold north wind in southeastern France

a storm with widespread snowfall accompanied by strong winds

a violent gusty wind

a discharge of lightning accompanied by thunder

a wind that blows from the north

a slight wind (usually refreshing); "the breeze was cooled by the lake"; "as he waited he could feel the air on his neck"

wind moving at less than 1 knot; 0 on the Beaufort scale

a warm dry wind blowing down the eastern slopes of the Rockies

the irregular motion of waves (usually caused by wind blowing in a direction opposite to the tide); "the boat headed into the chop"

a heavy rain

atmospheric moisture that has condensed because of cold

atmospheric moisture that has condensed because of cold

an electrical discharge accompanied by ionization of surrounding atmosphere

the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse

an electrical discharge accompanied by ionization of surrounding atmosphere

a violent rotating windstorm

flooding caused by a tumultuous breakup of ice in a river during the spring or summer

the normal brainwave in the encephalogram of a person in deep dreamless sleep; occurs with high voltage and low frequency (1 to 4 hertz)

the normal brainwave in the encephalogram of a person in deep dreamless sleep; occurs with high voltage and low frequency (1 to 4 hertz)

a heavy rain

the wearing down of rock particles by friction due to water or wind or ice

a belt of calms and light winds between the northern and southern trade winds of the Atlantic and Pacific

the falling to earth of any form of water (rain or snow or hail or sleet or mist)

a heavy rain

very light rain; stronger than mist but less than a shower

a windstorm that lifts up clouds of dust or sand; "it was the kind of duster not experienced in years"

a wind from the east

a wind from the east

a more intense El Nino that occurs every few years when the welling up of cold nutrient-rich water does not occur; kills plankton and fish and a…

a storm resulting from strong rising air currents; heavy rain or hail along with thunder and lightning

a storm resulting from strong rising air currents; heavy rain or hail along with thunder and lightning

a crystal of snow

a light brief snowfall and gust of wind (or something resembling that); "he had to close the window against the flurries"; "there was a flurry o…

weather cold enough to cause freezing

(meteorology) the atmospheric phenomenon created at the boundary between two different air masses

weather cold enough to cause freezing

a strong wind moving 45-90 knots; force 7 to 10 on Beaufort scale

a slight wind (usually refreshing); "the breeze was cooled by the lake"; "as he waited he could feel the air on his neck"

the wearing down of rock particles by friction due to water or wind or ice

a storm during which hail falls

a dusty wind from the Sahara that blows toward the western coast of Africa during the winter

atmospheric moisture or dust or smoke that causes reduced visibility

atmospheric discharges (lasting 10 msec) bursting from the tops of giant storm clouds in blue cones that widen as they flash upward

an oppressively hot southerly wind from the Sahara that blows across Egypt in the spring

an easterly wind in the western Mediterranean area

(physics) electromagnetic radiation that can produce a visual sensation; "the light was filtered through a soft glass window"

a streak of light in the sky at night that results when a meteoroid hits the earth's atmosphere and air friction causes the meteoroid to melt or…

an optical illusion in which atmospheric refraction by a layer of hot air distorts or inverts reflections of distant objects

a strong north wind that blows in France during the winter

very light rain; stronger than mist but less than a shower

a seasonal wind in southern Asia; blows from the southwest (bringing rain) in summer and from the northeast in winter

any wind that changes direction with the seasons

a storm blowing from the northeast

a wind that blows from the north

a wind that blows from the north

a wind from the northwest

(biology) a natural phenomenon involving living plants and animals

a transient air pressure greater than the surrounding atmospheric pressure; "the overpressure of the blast kills by lethal concussion"

too much strain

a heavy rain

the primary linkage of all protein structures; the chemical bond between the carboxyl groups and amino groups that unites a peptide

the primary linkage of all protein structures; the chemical bond between the carboxyl groups and amino groups that unites a peptide

the falling to earth of any form of water (rain or snow or hail or sleet or mist)

the pressure exerted by the atmosphere

water falling in drops from vapor condensed in the atmosphere

a drop of rain

water falling in drops from vapor condensed in the atmosphere

a violent hot sand-laden wind on the deserts of Arabia and North Africa

a streak of light in the sky at night that results when a meteoroid hits the earth's atmosphere and air friction causes the meteoroid to melt or…

a violent hot sand-laden wind on the deserts of Arabia and North Africa

a violent hot sand-laden wind on the deserts of Arabia and North Africa

(genetics) genetic variation in a DNA sequence that occurs when a single nucleotide in a genome is altered; SNPs are usually considered to be po…

a windstorm that lifts up clouds of dust or sand; "it was the kind of duster not experienced in years"

partially melted snow (or a mixture of rain and snow)

a crystal of snow

a storm with widespread snowfall accompanied by strong winds