Flood Watch Alert Today: Affected Areas, Live Map & Emergency Safety Tips

A broad flood watch blanketing parts of the Midwest, the Southeast and the Intermountain West remains in effect today as a slow-moving frontal system taps deep Gulf moisture and collides with record August heat. The National Weather Service warns that 2-4 inches of rain—locally 5 inches—could fall in training thunderstorms from eastern Kansas through southern Wisconsin, with urban areas such as Chicago and Milwaukee at highest risk for flash flooding. Similar totals are possible across Florida’s Atlantic coast this afternoon as sea-breeze collisions ignite slow-moving storms from Jacksonville to West Palm Beach. Farther west, monsoonal moisture will feed intense downpours over the Wasatch Front; forecasters in Salt Lake City caution that slot canyons and burn scars could flood in minutes once storms develop. Internationally, Thailand’s Meteorological Department has issued a heavy-rain alert for 29 provinces through 8 August, citing the same tropical moisture plume that is drenching the U.S. Gulf Coast; residents in Chiang Mai, Udon Thani and Phuket are urged to watch for sudden river rises and landslides. Why this event is different • Mid-summer soil saturation: June and July storms left rivers running above normal, so less rain is needed to trigger flash floods. • Nocturnal convection: Models show the heaviest bursts arriving overnight when most people are asleep, reducing lead time to seek higher ground. • Urban heat dome: Record heat has generated towering storm updrafts, boosting hourly rainfall rates to 2-3 inches. Safety actions now 1. Enable Wireless Emergency Alerts and local NWS push notifications for real-time flood warnings. 2. Pinpoint your nearest high ground and practice a 5-minute “go” plan to reach it. 3. Never drive across a water-covered roadway; just 12 inches of moving water can carry away an SUV. 4. If you live along a creek or in a basement apartment, pack valuables in watertight bins and move your car to higher parking lots before dusk. Travel impacts • Major-route threats: I-55 around Joliet, I-10 east of Tallahassee and I-15 near Provo could see closures during tonight’s peak rainfall window. • Flight delays: The FAA anticipates ground-stop programs for Chicago O’Hare, Atlanta and Orlando as lightning and low ceilings roll through. • Rail disruptions: Amtrak has instituted speed restrictions on Midwest and Florida lines where track washouts are possible. Forecast outlook The frontal boundary stalls through mid-week, keeping repeated rounds of heavy rain in play. A drier push of Canadian air will finally sweep south late Thursday, ending the multi-day flood threat for most U.S. locations, while the Thai low is projected to lift into Laos by Friday, easing monsoon rains in the region. Bottom line: If you are under a flood watch, conditions are ripe for life-threatening flash flooding with little warning. Stay alert, turn around at barricades, and update your emergency kit before the first raindrop falls.