Updated: August 16, 2026

Rising waterways and additional thunderstorms are keeping flood concerns elevated across parts of central Indiana.

Central Indiana Flooding: Indianapolis Weather Update

Central Indiana flooding remains a significant weather concern as Indianapolis and surrounding communities deal with elevated river levels and the potential for additional thunderstorms. The latest forecast calls for very humid conditions and another chance of thunderstorms on Sunday, with storms capable of producing flash flooding and localized damaging wind gusts.

Current National Weather Service information also shows flood warnings affecting waterways in and around Marion County. In Indianapolis, the Fall Creek at Millersville and White River at Indianapolis are both under flood warnings, with continued monitoring required as river levels fluctuate.

Is Indianapolis Flooding Right Now?

Yes. Flooding is currently affecting some waterways in the Indianapolis area, although the severity varies by location. The latest warning information indicates that river flooding is occurring along parts of Fall Creek and the White River.

The risk is not limited to rivers. Additional thunderstorms can produce rapid runoff, especially in low-lying areas, poor-drainage locations and roads that are prone to standing water.

What Is the Indianapolis Weather Forecast?

Indianapolis is expected to remain very humid on Sunday, August 16, with sunshine and clouds mixed together and the possibility of a thunderstorm in the area. Any storm that develops could produce locally heavy rainfall, flash flooding and damaging wind gusts.

Temperatures are expected to reach the mid-80s Fahrenheit before falling into the lower 70s overnight. The combination of heat, humidity and atmospheric instability means residents should continue monitoring updated forecasts throughout the day.

Where Is the Flooding Risk Highest?

The most immediate concern is around waterways that have already risen above flood stage. Current warnings include Fall Creek at Millersville, where minor flooding is occurring and moderate flooding is forecast, and the White River at Indianapolis, where moderate flooding is occurring or forecast.

Flooding can also occur away from rivers when intense rain overwhelms storm drains. Indianapolis has several locations that can collect water quickly during heavy thunderstorms, particularly underpasses, low-lying roads and areas with limited drainage capacity.

Why Is Central Indiana Seeing Flooding?

The primary concern is a combination of recent rainfall, saturated or runoff-prone areas and additional thunderstorms moving through the region. When several rounds of rain affect the same drainage basin, rivers and creeks can continue rising even after the heaviest rainfall has ended.

Urban flooding can develop even faster. Heavy rain falling over a short period can exceed the capacity of stormwater systems, creating dangerous conditions on streets and around intersections.

What Does WTHR Report on Indianapolis Weather?

WTHR, Indianapolis' local NBC affiliate, is one of the area's major sources for weather and severe-storm coverage. Its weather reporting typically follows storm development, flooding, road conditions, power outages and changing warnings across central Indiana.

During significant weather events, residents should compare local television updates with official National Weather Service alerts because warning boundaries and threat levels can change quickly.

Could More Flash Flooding Happen Sunday?

Yes. The current Indianapolis forecast specifically includes thunderstorms that could produce flash flooding. That does not mean every part of Indianapolis will flood, but a slow-moving or particularly intense storm could produce dangerous water levels over a short period.

People traveling through areas that have already experienced flooding should be especially careful because another round of heavy rain can quickly worsen existing conditions.

What Are the Current River Conditions?

The latest flood-warning information indicates that Fall Creek at Millersville is above its 10-foot flood stage and that the White River at Indianapolis is also above its established flood stage. Forecast river levels can rise and fall depending on rainfall upstream, so conditions may change even when the weather over Indianapolis appears relatively quiet.

Residents near the river should pay attention to official warnings rather than relying solely on visual observations. Water levels can increase rapidly and may remain hazardous after rainfall stops.

What Should Indianapolis Residents Do?

Residents should avoid driving through flooded roads and should never assume that shallow-looking water is safe to cross. Fast-moving floodwater can hide road damage, debris, open drainage structures and other hazards.

• Check the latest National Weather Service warnings before traveling.
• Avoid flooded streets, underpasses and low-water crossings.
• Move to higher ground if flooding threatens your location.
• Keep emergency alerts enabled on your phone.
• Never drive around a barricade blocking a flooded roadway.

What Happens to the Indianapolis Weather Next?

The weather pattern is expected to remain unsettled in the short term. A thunderstorm is possible Monday morning, followed by a generally more stable period on Tuesday. Another round of showers and thunderstorms is possible later in the week, particularly Thursday.

That means flood-prone locations may need continued monitoring even after Sunday's storms pass, especially if rivers remain elevated.

Why Indianapolis Flooding Is Trending

Search interest in Indianapolis flooding, central Indiana floods and Indiana weather is rising because of the combination of active flood warnings, elevated waterways and the possibility of additional thunderstorms.

The situation is dynamic rather than a single one-time flooding event. Weather conditions, river levels and local rainfall totals can change throughout the day, making real-time official alerts particularly important.

Bottom Line

Central Indiana flooding remains an active concern on August 16, 2026. Indianapolis is dealing with elevated river levels along parts of Fall Creek and the White River, while the forecast includes additional thunderstorms capable of producing flash flooding and damaging winds.

Residents should continue monitoring the National Weather Service and trusted local outlets such as WTHR, particularly before traveling. Even where major flooding is not occurring, heavy thunderstorms can quickly create dangerous conditions on roads and in low-lying areas.