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flash flooding
sudden, unexpected flood (lot of rain falling)
gravel
small stones used to make roads and paths
green light
to give official approval/ say something is OK
holding position
a place on an airfield, close to the runway, where a plane is told to wait until the pilot gets instructions from the ATC
immediate
happening right now
impatient
angry because things are not happening quickly
maintenance
the repairs that are needed to keep things in good condition
malfunction
not working correctly
moist
slightly wet