Rains that pelted the Washington area on-and-off for more than 24 hours were expected to subside Thursday night, leaving high water levels and power outages in their wake.

AAA Mid-Atlantic spokesman John Townsend said wet roads likely contributed to two high-profile crashes. On Wednesday afternoon, a tour bus went through a guardrail on Interstate 270, killing the driver and injuring several passengers. On Thursday morning, one Metrobus rear-ended another in Silver Spring, sending 26 passengers to the hospital with minor injuries.