More than 15 million people are under fire warnings in California – including Los Angeles, San Francisco and Sacramento – due to dry and windy conditions.

Relative humidity is forecast to be as low as 5% in some locations, along with wind gusts of up to 55 miles per hour. These conditions, combined with the dry soil and vegetation, can cause fires to start and spread more easily.

California Fire says they have increased staffing levels throughout the state for the duration of the alerts. The warnings are currently in effect until Saturday afternoon.

A fire near and around Oakland – the so-called “Basement Fire” – broke out Friday and has affected two homes and dozens are threatened. According to the latest official incident report, the fire is 35% contained and has burned 15 acres in Alameda County. Evacuation orders and warnings were issued.

Another fire that broke out Friday near Riverside — Mission Fire — is 40% contained after burning 17 acres. The fire’s progression was stopped.

The third fire that broke out Friday occurred between San Francisco and Sacramento – dubbed the Hay Fire – and is 70% contained after burning 869 acres in Solano County outside Fairfield, near Travis Air Force Base.

Tropical Storm Nadine

Tropical Storm Nadine made landfall near Belize City, Belize, at 12 p.m. ET with winds of 60 mph. Up to 30 cm of rain is possible in the mountainous terrain of inland Belize and parts of southern Mexico in the coming days.

Nadine is expected to weaken significantly as it moves inland. The National Hurricane Center expects the hurricane to dissipate over southern Mexico by late Sunday.

Nadine has sustained winds of 50 mph and is moving west at 8 mph.

Tropical Storm Warnings are in effect from Belize City, Belize, to Cancun, Mexico, including Cozumel.

According to the forecast, the center of Nadine is expected to make landfall on the Belize coast late Saturday or around noon and then continue to extend across northern Guatemala and southeastern Mexico late afternoon into the night.

With Nadine, widespread rainfall amounts of 4 to 8 inches are expected across northern Belize, northern Guatemala and southern Mexican states from Quintana Roo west to Veracruz.

Isolated areas of more than 12 inches are also possible through late Tuesday.

Minor coastal flooding is possible in areas of onshore winds near and north of where the center moves inland.

Hurricane Oscar arises

Newly formed Hurricane Oscar has rapidly strengthened near Turks and Caicos Islands with winds of 80 miles per hour. Just three hours after being classified as a tropical storm, the National Hurricane Center upgraded Oscar to a hurricane, with hurricane hunter aircraft noting the storm’s small size.

Oscar has a 24-hour window to strengthen further before unfavorable conditions arise.

A hurricane warning is in effect for the Turks and Caicos Islands, the southern Bahamas and parts of Cuba. Rainfall amounts of 2 to 6 inches are possible from the Turks and Caicos Islands to Cuba.