At work? Need to cross the Santa Cruz on the Northwest Side? You might want to stay put for a while. I-10 traffic at the Cortaro exit is backed up because the Cortaro Road bridge is the only route open over the river.

Need to cross the Rillito? Don't expect to cross at Dodge, where the bridge remains closed.

Floodwaters on the Rillito were receding this afternoon. All that water ended up in the Santa Cruz, where Marana officials closed almost all of the bridges and the river was reportedly running bank-to-bank and topping bridges.

With more rain in the forecast, there will be no obvious time to stand down from road and bridge closures that will be a hassle for commuters and a source of anxiety to local officials monitoring the effects of a phenomenol downpour in the Santa Catalina Mountains.

With ground already thoroughly soaked, almost 5 inches fell in the Molino Basin and Bear Canyon drainages in a few hours. The main Mount Lemmon gauge has reported 8.8 inches in the past four days.

Mount Lemmon Highway was closed due to rockslides. Catalina State Park was closed because the access road crosses washes that may be flowing heavily. The rains seem to be arriving mostly after midnight, meaning a relatively placid evening may be followed by a torrent tomorrow.

The Pima County Sheriff's Department was clearing people off of the walking and biking paths along the Rillito early this afternoon. They said the water level was dangerously high.

There have been no injuries reported.

Another storm is heading into the area, with a 40 percent chance of more rain later this afternoon, the National Weather Service reported.

The moist air mass is being forced through southern Arizona by a high-pressure system near the Four Corners area More rain or not, runoff in riverbeds and washes will remain high and dangerous. Authorities are urging motorists and all others out and about to proceed with caution...