The Cedar River at Landsburg reached a Phase IV flood alert level Monday morning, which could bring widespread flooding to low-lying areas along the river, potential road closures and floodwaters on State Route 169, according to the King County Flood Warning Center.

However, the river has reached its highest level, with its crest moving downriver. That crest would not lead to flooding in Renton and the river level is expected to continue to drop during the week.

Temperatures are dropping and less rain is in the forecast.

The Green River in Auburn was flowing at one of its highest levels in recent years and was at a Phase III flood level.

The Cedar was running at 5,070 cubic feet per second (CFS) at Renton at 11:15 a.m. Monday morning. Its flow at Landsburg, several miles below the Chester Morse Reservoir, was 4,410 cfs, a Phase 4 alert, the highest. The river’s level rose sharply Sunday as releases were increased from the reservoir.

The reservoir supplies drinking water its owner/operator, Seattle Public Utilities, and Seattle’s water customers.

The Cedar’s level in Renton is well below any recent high-water marks; the City of Renton is monitoring weather and river conditions.

The high water has closed the Cedar River Trail through downtown Renton.

The Snoqualmie River was at a Stage 3 flood alert.

At 8:45 a.m., the Green’s flow in Auburn was 10,400 cfs, which can cause some flooding upriver from Auburn and the lower Mill Creek area in the Tukwila and Renton area. That level is slightly lower that previous overnight readings.

Extreme flooding doesn’t occur until the Green’s level reaches 12,000 cfs. The river’s flow is controlled at the Howard Hanson Dam by the U.S. Army Corps of engineers, which is monitoring levees along the Green.