The Wisconsin Department of Transportation is warning drivers to watch out for buckling pavement during a record-setting heatwave. Several roads buckled in the Eau Claire area last weekend when temperatures moved into the mid-to-upper-90s. An on-ramp to Interstate 90 in Columbia County was closed for repairs Saturday and more pavement was buckled that same day on Interstate 41 near Neenah. The Department of Transportation says pavement buckles when road temperatures warm quickly after being cool for months. The problem normally doesn’t happen in Wisconsin until the summer months.