The US National Weather Service said Hawaii may experience high surfs and heavy rains, with Hurricane Lowell forecast to pass west of Kauai`s coastal waters.
Lowell, a Category 3 Hurricane on the Saffir-Simpson hurricane wind scale, is forecast to weaken beginning Sunday night into Monday. However, it is expected to remain a hurricane as it passes near the Hawaiian Islands, the NWS' National Hurricane Center said in its latest advisory on Sunday night.
"On the forecast track, the center of Lowell will move across portions of the Papahanaumokuakea Marine National Monument, just west of the main Hawaiian Islands, on Monday night. Lowell is then forecast to turn toward the northwest and slow down by early Wednesday after passing the Hawaiian Islands," the NHC said.
Meanwhile, the South-Central Plains and the Lower/Middle Mississippi Valley are forecast to experience continued sweltering heat into this week, with limited relief expected during nights, the NWS said.
The northern Rockies region is likely to encounter periods of moderate to heavy rainfall through Tuesday morning.
The NWS early Monday issued a red flag warning for Wyoming's Worland, Hulett, Moorcroft, Gillette, Wright, Newcastle and parts of Sundance. Wyoming mostly falls under the service area of PacifiCorp's Rocky Mountain Power.
A similar warning was raised for South Dakota's Edgemont, Hot Springs, and parts of Custer, primarily served by Black Hills (BKH) subsidiary Black Hills Energy.
In Kansas, an extreme heat warning was issued for Paola, Ottawa, Olathe, Topeka, Leavenworth, Atchison, Emporia, Concordia, Manhattan, and Lawrence. Evergy (EVRG) is among the major service providers in the state.
Areas covered under an extreme heat warning in Missouri included Joplin, Nevada, Kansas City, Harrisonville, Butler, and areas near Branson, Springfield and Clinton. Evergy, Ameren's (AEE) Missouri unit, and Algonquin Power & Utilities (AQN) subsidiary Liberty are the major service providers in Missouri.
In Montana, the NWS issued a severe thunderstorm warning for Malta, and a flash flood warning for areas near Cut Bank and Havre. MDU Resources (MDU) unit Montana-Dakota Utilities and Northwestern Energy (NWE) are the major service providers in Montana.
The NWS issued a flood warning for Beaumont, Port Arthur and areas near Orange and Kountze in Texas. These places are primarily served Entergy's (ETR) Texas unit.
A freeze warning was raised for Oregon's Chemult, Silver Lake, Crater Lake, Paisley, Adel, Lakeview, Klamath Falls, Bly, Chiloquin, and Crater Lake. These places primarily fall under the service area of PacifiCorp's Pacific Power and Idacorp's (IDA) Idaho Power.
In California, the agency issued a similar warning for Macdoel, Tulelake, Canby, Alturas, Likely, and Mount Shasta, also served by Pacific Power.