Heavy rainfall Saturday flooded a low-lying portion of Interstate 10 in Phoenix and closed some local streets.
The Arizona Department of Transportation said both directions of I-10 were closed at 43rd Avenue on the city's west side and that drivers should avoid the area.
The National Weather Service said it recorded 1.17 inches of rain by 1 p.m., setting a new record for Phoenix for the date and making the month the wettest October on record for Arizona's most populous city.
Flash flood watches and warnings and flood advisories remained in effect across much of Arizona as moderate showers continued into the afternoon.
Forecasters said the rainfall would decrease through Saturday evening but not end until the evening.