Heat and humidity are again building in Kentucky and the National Weather Service has issued an excessive heat warning for western counties in the commonwealth. The warning is from 10 a.m. Monday through 7 p.m. Thursday.
The time span and scope of the warning could be expanded later.
The warned area includes western Kentucky and extends as far east as Owensboro, Madisonville and Hopkinsville.
The NWS office in Paducah said heat indexes are expected to reach about 105 degrees. That's the combined effect of heat and humidity. There won't be much cooling at night, with minimum indexes forecast in the mid-70s.
Forecasters caution that the effect on people and animals is cumulative and the warning was issued partly because of sustained hot weather in the region.