Downgraded from a hurricane, Tropical Storm Iselle will bring heavy rain and damaging winds to Hawaii today.
The Big Island was put under a hurricane warning, the first since 1993.
Iselle will continue moving west, dropping large amounts of rain on Maui and The Big Island, as well as rain for the rest of the state.
The tropical storm will make its exit later today, but another hurricane could threaten the state.
Hurricane Julio strengthened to a major hurricane with winds at 120 mph sustained.
The track of Julio takes the hurricane north of Hawaii on Sunday, but the forecast path should be monitored.
San Bernardino County was the site of dangerous flash flooding on Sunday that left one person dead.
The heavy rain and steep terrain resulted in mudslides that blocked roads and trapped residents.
The threat of rain is diminishing for the region.
Indra Petersons explores how the canyon can enhance dangerous flooding.
RELATED: Mudslides trap Southern California town, stranding thousands
Last night, the low pressure being monitored for the past several days developed into the second tropical storm of the Atlantic hurricane season, Tropical Storm Bertha.
Bertha will reach Barbados and the Lesser Antilles through today and could bring as much as 6" of rain for the Leeward Islands, Puerto Rico, and the Virgin Islands today and tomorrow.
The forecast track brings the path of Bertha close to the US mainland before turning the storm before making landfall.
Keep track of the latest developments by following Indra Petersons on twitter at @IndraPetersons or checking out CNN.com/Weather.
Thunderstorms in Southern California caused injuries and a death on Sunday due to lightning.
Several people were taken to the hospital after a lightning bolt struck in Venice Beach during the afternoon.
An unusual shift in monsoonal moisture brought storms to the region and impacted the beaches of the area.
CNN's Indra Petersons explained the events of the dangerous weather.More on the Venice Beach lightning injuries