Researchers are working to determine if there is any relationship between climate change and the number and severity of tornadoes

Northeastern Arkansas saw a tornado emergency issued as a large twister hit Lake City. The tornado was a part of a storm sweeping from Texas to Ohio.

Dozens of tornado and severe thunderstorm warnings were issued Wednesday in parts of Arkansas, Illinois, Indiana, Missouri and Mississippi as storms hit those and other states in the evening. Numerous possible twisters were reported in the South overnight, particularly in Tennessee and Kentucky.

A powerful tornado swept through Carmel, Indiana, late Wednesday night, leaving a trail of destruction and chaos in its wake.

A tornado touched down in Carmel, Indiana, Wednesday night, causing destruction and leaving debris scattered across streets, with fallen trees and power lines blocking roads in some areas.

Indianapolis and Central Indiana could be in for severe weather Sunday afternoon, with thunderstorms, hail and damaging winds possible.

A four-day, once-in-a-generation weather event is pounding the middle of the U.S. with destructive tornadoes and life-threatening flooding.

Central Indiana is already elevated to a flood warning around its rivers and streams. The U.S. could have severe thunderstorms and heavy rain from Texas to Ohio in coming days, an area already hard hit by Wednesday's deadly storms that prompted a rare 5 of 5 threat level in some areas.