Strong-to-severe thunderstorms will be possible across the lower Ohio Valley on Wednesday, as well as the risk of flash flooding for portions of the northern Plains and upper Midwest.

EFFORTS TO BATTLE FIRE IN NEW MEXICO AIDED BY THUNDERSTORMS

U.S. rain forecast

Map of U.S. rain forecast (Credit: Fox News)

Record-breaking heat continues over the southern and central Plains, with above-average temperatures spreading into the mid-Atlantic and Northeast.

Severe storm threats

Map of severe storm threats (Credit: Fox News)

Meanwhile, cold air and unsettled weather will move into the Northwest.

Potential record heat

Map of potential record-high temperatures (Credit: Fox News)

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Fire danger remains critical over parts of the Southwest and into the central and southern Plains on Thursday.