Flash Flood Watch and Excessive Heat Warnings Today

Another day of hot and humid weather is expected in Riverside County today, accompanied by a threat of flash flooding in the mountains and deserts because of scattered thunderstorms forecast for this afternoon.

"Very moist and unstable conditions will produce thunderstorms in the
mountains and on desert slopes this afternoon,'' according to the National
Weather Service. "These storms are expected to produce flash flooding in some
areas. Portions of the Inland Empire along a line from Lake Elsinore toward
Hemet could also be impacted by thunderstorms producing heavy rain.''

A flash flood watch is scheduled for the Coachella Valley and all of Riverside County from 10 a.m. through this evening.

The weather service warned that during that time, excessive runoff from
heavy downpours may cause rapid filling and overflowing of normally dry washes, creeks, small streams and low-lying areas. There is also a threat of rock and mud slides below steep terrain in the mountains and recently burned areas, according to the agency.

The Coachella Valley also is subject to an excessive heat warning, which
indicates health-threatening conditions resulting from high heat and
humidity, until 10 p.m.

"High pressure to the east and monsoonal moisture will continue hot
humid weather through this evening,'' according to the Weather Service.  "A
weak trough of low pressure over the Eastern Pacific will bring minor cooling
and a little less humidity for the middle park of the week.''

Daytime highs in the Coachella Valley today are expected to be between
108 and 118 degrees, with overnight lows of 82 to 92 degrees.