It can be difficult to understand the difference between them and what you should do when there is one in your area.

The warning was in place for San Bernardino County. "The heavy rain has ended in the Primm area. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. A Flood Watch remains in effect until 11 p.m. for portions of northwest Arizona and Nevada," says the NWS Las Vegas NV.

A Flash Flood Watch is in effect for parts of Indiana and Kentucky until 8 p.m. Monday. KENTUCKY, USA — A Flash Flood Warning has been issued for a portion of the WHAS11 viewing area until 8 p.m. Monday. According to the National Weather Service, waves of showers and thunderstorms are expected to move over the watch area over the next few days.

A flash flood warning was issued by the National Weather Service in Mount Holly at 7:38 p.m. on Wednesday, July 16.

A flash flood warning was issued by the National Weather Service in Melbourne at 11:08 a.m. on Tuesday, July 15.

FOX 5 NY's meteorologist Audrey Puente explains the difference between flash flood alerts and flash flood warnings.

The National Weather Service has issued a flash flood warning for three Acadiana parishes where 2-9 inches of rain has already fallen in some spots. Iberia, St. Martin and St. Mary parishes are under a flash flood warning until 5:15 p.m. Thursday. Flash flooding is ongoing or expected to begin shortly, according to the NWS notice.

The Flood Watch covers most of the state, barring some counties in northwestern and southeastern Oklahoma, through at least Sunday afternoon.