Severe weather sweeps through the Ohio Valley, with tornadoes reported in several states. Kentucky declares a state of emergency as structures sustain damage, but no fatalities are reported. Millions remain under tornado watch as the storm moves eastward, affecting multiple states and prompting safety warnings. [ad_1] Thunderstorms, large hail and strong winds swept through the Ohio Valley on Tuesday, bringing large hail, uprooting trees and flipping mobile homes, officials said. On Tuesday evening, there were reports of tornadoes in Illinois, Tennessee, Ohio and in Kentucky, according to the National Weather…