At least the drought had driven off the mosquitoes.

Historically it was rare in urban areas; the first influx was noted after drought drove birds eastwards in the late 1970s.

The drought of 1863 drove the miners away.

It is thought that drought and overuse of limited resources drove them to the south, along the Rio Grande.

A severe drought ruined two consecutive crops, killed livestock and drove already high food prices beyond what many families could afford.

A four-year drought, aggravated by two decades of war, has driven an estimated million Afghans from their homes in search of food.

Even this drought cannot have driven so many from their farms in just a few months.

Ms. Combs has predicted that the prolonged drought could drive some 10 percent of the state's agricultural producers out of business this year.

Development slowed, drought drove farmers from their farms, and coal mining rapidly declined from its peak.

Extreme drought does kill many populations of insects, but also drives surviving insects to invade more often.