Santa Rosa Press Democrat18 分钟
What causes mudslides, and what can be done to lessen the danger?
Mudslides are dangerous torrents that are usually referred to by geologists and first responders as debris flows.
来自MSN37 分钟
California braces for heavy rains as car pileup in winter storm closes an Oregon interstate
Snow and ice in whiteout conditions contributed to as many as 30 cars involved in a pileup on a major highway connecting ...