Moderate

The combination of temperatures in the upper 80s to around 90 and high humidity will result in the heat index reaching 95 to 100 degrees this afternoon. If planning to be outdoors for extended periods today, drink plenty of water, wear light and loose clothing, and take frequent breaks.

* WHAT...High wave action, strong currents, and dangerous swimming conditions expected. Piers may be heavily swamped by waves. * WHERE...Mason, Oceana, Muskegon, Ottawa, Allegan and Van Buren counties. * WHEN...From this evening through Friday morning. * IMPACTS...Strong currents can pull swimmers into deeper water and high waves can sweep people off piers. * ADDITIONAL DETAILS...Winds will increase this evening out of the southwest building waves to 3 to 6 feet tonight. The waves

Strong northeasterly wind gusts not associated with thunderstorms have developed across part of the U.S. Highway 20 region in eastern Iowa. Waterloo Airport gusted to over 60 mph with isolated wind damage reported. While winds are not expected to be that strong to the east, gusts over 40 mph are expected for parts of Benton, Buchanan, Delaware, and northern Linn Counties. These should persist through 11 to 1130 AM. Expect temporary difficult driving conditions for high profile vehicles.

* WHAT...Heat index values up to 105 expected. * WHERE...Areas near and east of the Interstate 95 corridor from northeast to southern Maryland and the northern neck of Virginia, including Baltimore MD and Washington DC. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose

* WHAT...Dangerous rip currents and breaking waves due to elevated surf of 3 to 6 feet with local sets to 7 feet on south facing beaches. * WHERE...Ventura County Beaches. * WHEN...Through this evening. * IMPACTS...There is an increased risk of ocean drowning. Rip currents can pull swimmers and surfers out to sea. Waves can wash people off beaches and rocks, and capsize small boats nearshore. Remain out of the water due to hazardous swimming conditions, or

* WHAT...Northwest winds 30 to 40 mph with gusts up to 50 mph. * WHERE...Portions of northwestern and southwestern South Dakota. * WHEN...Until 5 PM MDT this afternoon. * IMPACTS...Sudden wind gusts can cause drivers to lose control, especially in lightweight or high profile vehicles. Strong winds can cause blowing dust, reduced visibility, and flying debris. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.

* WHAT...Northwest winds 25 to 35 mph with gusts up to 50 mph. * WHERE...Eastern Fall River, Southern Foothills, and Western Fall River. * WHEN...Until 5 PM MDT this afternoon. * IMPACTS...Sudden wind gusts can cause drivers to lose control, especially in lightweight or high profile vehicles. Strong winds can cause blowing dust, reduced visibility, and flying debris. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.

* WHAT...Peak heat index values up to 100 degrees are expected. * WHERE...Portions of central, northern, southern, and western West Virginia. * WHEN...Until 6 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Additional information can be found at https://www.weather.gov/rlx as well as on our X and Facebook pages.

* WHAT...Peak heat index values of around 100 degrees expected. * WHERE...Portions of north central, northeast, and northwest Ohio. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning

* WHAT...High temperatures of 96 to 105 expected for most valley locations. Moderate to Major HeatRisk expected. * WHERE...Lake County, and Southeastern Interior Mendocino. * WHEN...From noon today to 10 PM PDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses especially for those without cooling or hydration. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.