Extreme Heat Warnings, Extreme Heat Watches, and Heat Advisories are in effect across 31 U.S. states after the National Weather Service (NWS) issued a series of heat alerts on June 29, 2026. Peak heat index values are forecast to reach 46°C (115°F), with dangerous heat and humidity expected to persist into early July across parts of the Midwest, Northeast, Southeast, and central United States.
Heat Advisories and Extreme Heat Watches have been issued across parts of Illinois, Missouri, Kansas, Iowa, Nebraska and South Dakota ahead of intensifying heatwave beginning Sunday, June 28, 2026. Heat index values are forecast to exceed 38°C (100°F) across much of the region, with some areas expected to reach 41 to 43°C (105 to 110°F) through Tuesday or Thursday, depending on location.
At least two women were reported dead after a tornado touched down in Mount Vernon in northeastern Jefferson County on June 21, 2026.
A tornado damaged the Park Place Apartments retirement community in Newburgh, Indiana, on June 21, 2026, as severe weather moved across portions of Illinois and Indiana.Among the hardest-hit locations was Newburgh, Indiana, where a tornado damaged part of a retirement community. The Storm Prediction Center received 37 tornado reports during the outbreak, while emergency crews responded to structural damage, downed trees, and transportation disruptions.
The National Weather Service (NWS) Central Illinois office confirmed seven tornadoes across central Illinois following severe thunderstorms on June 17, 2026, including an EF3 tornado with peak winds of 241 km/h (150 mph) that tracked 42.2 km (26.2 miles) through Effingham County and injured two people. The surveys documented tornadoes affecting portions of Effingham, Jasper, Coles, Menard, Sangamon, Christian, Macon, Shelby, and Moultrie counties.
A train was derailed in Warren County, Illinois, as severe storms brought winds of up to 161 km/h (100 mph) across the region on June 17, with National Weather Service surveys confirming three EF-1 tornadoes in Illinois and Iowa.
Multiple reported tornadoes affected parts of the Midwest on June 17, 2026, causing widespread damage in Illinois. At least one person was injured in Coles County after a reported tornado touched down near Mattoon. Severe damage and gas leaks were reported in Effingham, while a Local State of Emergency was declared for Charleston due to the storm damage.
A Moderate Risk (Level 4 of 5) for severe thunderstorms has been issued for parts of Indiana and Illinois through June 17, 2026. Wind gusts of over 120 km/h (75 mph), damaging hail and multiple tornadoes are forecast across the region as the storm system moves through the Midwest.
Seven tornadoes, including two rated EF3, struck parts of Illinois and Indiana on June 11, 2026. The storms injured at least seven people, severely damaged 44 homes in Streator, caused minor damage to 35 others, and damaged at least 200 buildings in Merrillville.
An EF3 tornado struck the Washburn area of central Illinois on June 10. 2026. The tornado reached a maximum width of 777 m (2 550 feet) and produced winds of up to 249 km/h (155 mph). Three EF1 tornadoes were confirmed near Lincoln’s New Salem, Athens, and Springfield. An EF0 tornado was also reported near Ipava.
