Placentia Warnings, Watches and Advisories

Do not drive vehicles through flooded areas. The water depth or fast flowing water/mud/debris from a flash flood will make road conditions unsafe. Do not rely soley on data presented here or other third-party websites - always check your official national and local weather service agency website, socials, radio and/or TV stations for making critical decisions related to weather events.

Please carefully read each posted Warning and Alert as it relates to the area(s) being affected. We may provide a wider range of issued severe weather warnings for surrounding cities and counties, so some alerts may not directly impact this location. This is done to help with preparing for severe weather that may overlap or be heading towards Placentia.

Use the Radar Maps link provided to understand the trajectory of a storm.

Beach Hazards Statement issued October 6 at 2:50PM PDT until October 7 at 5:00PM PDT by NWS Eureka CA

* WHAT...Increased threat of sneaker waves expected. * WHERE...Coastal Del Norte and Northern Humboldt Coast Counties. * WHEN...From Monday morning through Monday afternoon. . * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath.

Excessive Heat Warning issued October 6 at 1:58PM PDT until October 7 at 8:00PM PDT by NWS Las Vegas NV

* WHAT...Dangerously hot conditions with high temperatures of 105 to 107 degrees. * WHERE...Cadiz Basin and Morongo Basin. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events, especially at the end of record-breaking summer heat.

Excessive Heat Warning issued October 6 at 1:58PM PDT until October 7 at 8:00PM PDT by NWS Las Vegas NV

* WHAT...Dangerously hot conditions for early October. Temperatures in the lower elevations of Death Valley National Park will top out around 110 to 113 degrees each afternoon. * WHERE...Death Valley National Park. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Heat-related illnesses increase significantly during extreme heat events, especially at the end of record-breaking summer heat.

Excessive Heat Warning issued October 6 at 1:58PM PDT until October 7 at 8:00PM PDT by NWS Las Vegas NV

* WHAT...Dangerously hot conditions for early October with record to near record high temperatures of 107 to 110 degrees. * WHERE...Lake Mead National Recreation Area, Lake Havasu and Fort Mohave, and San Bernardino County-Upper Colorado River Valley. * WHEN...Until 8 PM PDT /8 PM MST/ Monday. * IMPACTS...Heat-related illnesses increase significantly during extreme heat events, especially at the end of record-breaking summer heat.

Heat Advisory issued October 6 at 1:47PM PDT until October 7 at 11:00PM PDT by NWS Sacramento CA

* WHAT...Hot temperatures 92 to 104 expected with warm overnight lows in the 60s to upper 70s. * WHERE...Carquinez Strait and Delta, Central Sacramento Valley, Motherlode, Northern San Joaquin Valley, and Southern Sacramento Valley. * WHEN...Until 11 PM PDT Monday. * IMPACTS...Heat related illnesses will be possible, especially for groups that are sensitive to heat. * ADDITIONAL DETAILS...Widespread Moderate to Major HeatRisk is expected across the Valley, Delta, and foothills. Limited overnight cooling expected in the foothills. This level of heat may impact outdoor activities.

Excessive Heat Warning issued October 6 at 1:22PM MST until October 7 at 8:00PM MST by NWS Phoenix AZ

* WHAT...Dangerously hot conditions. Afternoon temperatures 104 to 110 degrees. Major Heat Risk. * WHERE...Portions of south central and southwest Arizona and southeast California. * WHEN...Until 8 PM MST /8 PM PDT/ Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke

Excessive Heat Warning issued October 6 at 1:22PM MST until October 7 at 8:00PM MST by NWS Phoenix AZ

* WHAT...Dangerously hot conditions. Afternoon temperatures 105 to 111 degrees. Major Heat Risk. * WHERE...Western Imperial County, and Imperial Valley including the city of El Centro. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke.

Excessive Heat Warning issued October 6 at 12:44PM PDT until October 7 at 8:00PM PDT by NWS San Diego CA

* WHAT...Dangerously hot conditions with high temperatures of 90 to 100F. Low temperatures of 65 to 75 degrees, warmest in the foothills. * WHERE...San Diego County Valleys. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Widespread moderate to major HeatRisk.

Heat Advisory issued October 6 at 12:44PM PDT until October 7 at 8:00PM PDT by NWS San Diego CA

* WHAT...High temperatures of 88 to 100 in the mountains and foothills. Low temperatures in the mid 60s into the 70s. * WHERE...San Diego County Mountains. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Moderate HeatRisk can be dangerous for outdoor activities.

Excessive Heat Warning issued October 6 at 12:44PM PDT until October 7 at 8:00PM PDT by NWS San Diego CA

* WHAT...Dangerously hot conditions with high temperatures of 90 to 100F. Low temperatures 65 to 70. * WHERE...Santa Ana Mountains and Foothills. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Moderate to locally major HeatRisk.

Excessive Heat Warning issued October 6 at 12:44PM PDT until October 7 at 8:00PM PDT by NWS San Diego CA

* WHAT...Dangerously hot conditions with high temperatures upper 90s to 105 degrees. Low temperatures 65 to 72, warmest in the higher terrain. * WHERE...San Bernardino and Riverside County Valleys-The Inland Empire. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

Excessive Heat Warning issued October 6 at 12:44PM PDT until October 7 at 8:00PM PDT by NWS San Diego CA

* WHAT...Dangerously hot conditions with temperatures up to 110. * WHERE...San Gorgonio Pass Near Banning. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Major HeatRisk continues.

Excessive Heat Warning issued October 6 at 12:44PM PDT until October 7 at 8:00PM PDT by NWS San Diego CA

* WHAT...Dangerously hot conditions with high temperatures of 108 to 113. Low temperatures in the upper 70s and 80s. Slight cooling is expected on Tuesday into the latter part of the week. * WHERE...Coachella Valley and San Diego County Deserts. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Warm overnight temperatures will lead to less relief from the heat, prolonging impacts. * ADDITIONAL DETAILS...Major HeatRisk from excessive temperatures.

Heat Advisory issued October 6 at 12:44PM PDT until October 7 at 8:00PM PDT by NWS San Diego CA

* WHAT...High temperatures 85 to 95 across the portions of the mountains and foothills. * WHERE...Riverside County Mountains and San Bernardino County Mountains. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hottest conditions expected over the weekend.

Heat Advisory issued October 6 at 11:55AM PDT until October 7 at 8:00PM PDT by NWS Los Angeles/Oxnard CA

* WHAT...Hot daytime conditions with high temperatures of 92 to 102 degrees common. Foothill locations will be hotter with warm overnight lows. * WHERE...San Luis Obispo County Inland Central Coast and Santa Ynez Valley. * WHEN...Until 8 PM PDT Monday. * IMPACTS...There is a high risk for heat illness for sensitive populations including the very young, the very old, those without air conditioning, and those active outdoors.

Excessive Heat Warning issued October 6 at 11:55AM PDT until October 7 at 8:00PM PDT by NWS Los Angeles/Oxnard CA

* WHAT...Dangerously hot conditions with high temperatures of 98 to 108 degrees common. Warm overnight lows of 75 to 85 degrees are expected in the lower mountains and foothills. * WHERE...A portion of southwest California. * WHEN...Until 8 PM PDT Monday. * IMPACTS...There is a high risk for dangerous heat illness for anyone, especially for the very young, the very old, those without air conditioning, and those active outdoors. * ADDITIONAL DETAILS...It will be very dangerous to perform strenuous activities during the late morning through early evening hours this weekend. Use extreme caution when hiking or biking anywhere in the warned area, including in the popular Santa Monica Mountains.

Heat Advisory issued October 6 at 11:37AM PDT until October 6 at 11:00PM PDT by NWS Hanford CA

* WHAT...Hot conditions expected with temperatures reaching up to 103 degrees during the period. Moderate to high heat risk expected. * WHERE...A portion of central California. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Heat related illnesses increase significantly during high heat events.

Heat Advisory issued October 6 at 5:34AM PDT until October 6 at 11:00PM PDT by NWS San Francisco CA

* WHAT...Temperatures up to 94. * WHERE...San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast. * WHEN...Until 11 PM PDT Sunday. * IMPACTS...Those sensitive to heat, such as the homeless, elderly, children, and pets will be at risk for heat-related illnesses. Those without effective cooling and/or adequate hydration will be at the greatest risk. * ADDITIONAL DETAILS...Heat impacts will persist through the weekend. Cumulative impacts of heat will increase the risk of heat-related illnesses.

Excessive Heat Warning issued October 6 at 5:34AM PDT until October 6 at 11:00PM PDT by NWS San Francisco CA

* WHAT...Dangerously hot conditions with temperatures up to 100. * WHERE...Marin Coastal Range, Sonoma Coastal Range and North Bay Interior Mountains. * WHEN...Until 11 PM PDT Sunday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. Without effective cooling and/or adequate hydration, heat-related illnesses including heat stroke will be a risk to everyone. * ADDITIONAL DETAILS...Major (level 3 of 4) and Extreme HeatRisk (level 4 of 4) across the region.

Excessive Heat Warning issued October 6 at 5:34AM PDT until October 6 at 11:00PM PDT by NWS San Francisco CA

* WHAT...Dangerously hot conditions with temperatures up to 104. * WHERE...Southern Salinas Valley, Arroyo Seco, and Lake San Antonio, Santa Lucia Mountains and Los Padres National Forest and Mountains of San Benito and Interior Monterey County including Pinnacles National Park. * WHEN...Until 11 PM PDT Sunday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. Without effective cooling and/or adequate hydration, heat-related illnesses including heat stroke will be a risk to everyone. * ADDITIONAL DETAILS...Major (level 3 of 4) to Extreme HeatRisk (level 4 of 4) in the higher elevations. Elsewhere, cumulative impacts of heat will increase the risk of heat-related illnesses.

Heat Advisory issued October 6 at 5:34AM PDT until October 6 at 11:00PM PDT by NWS San Francisco CA

* WHAT...Temperatures up to 100. * WHERE...North Bay Interior Valleys and Northern Salinas Valley, Hollister Valley, and Carmel Valley. * WHEN...Until 11 PM PDT Sunday. * IMPACTS...Those sensitive to heat, such as the homeless, elderly, children, and pets will be at risk for heat-related illnesses. Those without effective cooling and/or adequate hydration will be at the greatest risk. * ADDITIONAL DETAILS...Heat impacts will persist through the weekend. Cumulative impacts of heat will increase the risk of heat-related illnesses.

Excessive Heat Warning issued October 6 at 5:34AM PDT until October 6 at 11:00PM PDT by NWS San Francisco CA

* WHAT...Dangerously hot conditions with temperatures up to 94. * WHERE...The hottest locations will be in the vicinity of Bayview, Mission, North and South Bernal Heights district. * WHEN...Until 11 PM PDT Sunday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. Without effective cooling and/or adequate hydration, heat-related illnesses including heat stroke will be a risk to everyone. * ADDITIONAL DETAILS...Cumulative impacts from heat will increase the risk of heat-related illnesses.

Excessive Heat Warning issued October 6 at 5:34AM PDT until October 6 at 11:00PM PDT by NWS San Francisco CA

* WHAT...Dangerously hot conditions with temperatures up to 104. * WHERE...San Francisco Bay Shoreline, East Bay Interior Valleys, Santa Cruz Mountains, Santa Clara Valley...including San Jose, Eastern Santa Clara Hills, and the East Bay Hills. * WHEN...Until 11 PM PDT Sunday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. Without effective cooling and/or adequate hydration, heat-related illnesses including heat stroke will be a risk to everyone. * ADDITIONAL DETAILS...Major (level 3 of 4) to Extreme HeatRisk (level 4 of 4) in the mountains and nearby passes. Elsewhere, cumulative impacts of heat will increase the risk of heat- related illnesses.