Millions are on alert for flash floods as a powerful storm soaks the West Coast.

Much-needed rain soaked the Northeast, though it won't be enough to end a drought. On the West Coast, the storm system brought torrential rain to Northern California, raising the risk of mudslides.

Over the past three months, there has been a significant lack of precipitation across the Northeast, according to experts.

One woman was killed when a tree fell into her home, while another died when a tree crashed into a homeless encampment. Over 470,000 customers are without power in Washington state.

Two people were killed by falling trees in Washington state as a powerful storm hammered the Pacific Northwest.

Two people were killed by falling trees in Washington state as a powerful storm hits the Pacific Northwest.

The Northeast braced for its heaviest rain in months as it endured a record drought, while the bomb cyclone spiraling in the Pacific is hitting the West Coast.

A major storm was sweeping across the U.S. Northwest, battering the region with strong winds and rain

The bomb cyclone bringing high wind gusts to the Pacific Northwest is about to pull in a plume of moisture in the form of an atmospheric river.

Residents throughout Northern California and parts of the Pacific Northwest are preparing for an onslaught of rain and wind throughout the region.

ABC News’ Ginger Zee shares the latest forecast as storms prepare to hit both coasts.

It is not possible for anyone -- whether it be the government, scientists or billionaires -- to control the weather, according to experts.

ABC News chief meteorologist Ginger Zee explains the technique that increases a cloud’s ability to produce rain or snow.

Firefighters battling an outbreak of wildfires across the Northeast amid a historic autumn drought could get some relief from Mother Nature by the middle of this week.

A massive plume of moisture from the Pacific called an atmospheric river will hit the West Coast on Tuesday afternoon and last into Friday.

ABC News’ Ginger Zee has the latest forecast, which shows more than an inch of rain expected later this week.

New York Gov. Kathy Hochul declared a drought watch for the state. Fifteen counties, including New York City, have been issued drought warnings. Residents have been urged to conserve water.

Tropical Storm Sara has weakened to a tropical depression after making landfall in Belize, where forecasters expect heavy rain to cause flash flooding and mudslides

ABC News’ Somara Theodore reports on the Northeast fire threat and the latest tracking on Tropical Storm Sara.

Tropical Storm Sara has started moving slightly faster after stalling over Honduras, drenching the northern coast of the Central American nation, swelling rivers and trapping some people at home

Red flag warnings are in effect across eight states, including nearly 43 million people in the northeast as fire danger remains elevated.

The storm is expected to sweep across Honduras and Belize on Saturday, unleashing up to 35 inches of rain in some areas over the next several days.

Dry conditions in the Northeast are worsening, creating a scenario for fire danger in the region to persist, an updated map from the U.S. Drought Monitor shows.

Local governments are preparing and building structures to minimize the damage.

Firefighters battled brush fires in New Jersey and Brooklyn.

A large storm over the central U.S. is bringing a range of weather issues, from flooding rain and severe weather to heavy snow in the Rockies.

Thousands of firefighters continue to battle a blaze in California, aided by Friday's slower winds, while a helicopter dropped water to quench a wildfire near New York's George Washington Bridge.

Georgia Gov. Brian Kemp has declared a state of emergency in 23 counties swamped by flooding rainstorms

A major storm system is bringing a historic early season snowstorm to New Mexico and Colorado.

A major storm system is bringing a historic early season snowstorm to New Mexico and Colorado.

Spain’s catastrophic floods have left behind staggering devastation and despair

Japan's Mount Fuji has finally regained its trademark signature snowcap, following a record-breaking period of high temperatures.

Hurricane Rafael strengthened to a major Category 3 hurricane as it nears the western coast of Cuba.

As millions of Americans head to the polls, thunderstorms are forecast from the Great Lakes to the Gulf Coast, with the potential to cause inconveniences to voters.

Jamaica, the Cayman Islands and Cuba are expected to be hit in the coming days. In the U.S., everyone from Texas to Florida should monitor the storm's path as it approaches closer to the weekend.

An emergency tornado warning was in effect on the University of Oklahoma's Norman campus, officials said.

Inside the National Oceanic and Atmospheric Administration.

Severe weather continues across the southern Plains into Monday.

The death toll from catastrophic flooding in Valencia, Spain, has reached 217 as the search for survivors -- and bodies -- continued in devastated cities and towns.

The south-central U.S. is the focus of unsettled weather this weekend, with a flash flooding threat and severe thunderstorms across a large swath of the southern Plains.

The death toll from the catastrophic flooding in Spain has risen to at least 158, with many more missing and believed to be trapped in buildings and vehicles.

As record-breaking high temperatures were expected Wednesday, snow blanketed the mountaintops of Hawaii and residents of the Great Plains were bracing for tornadoes.

ABC News’ Sam Champion has the latest on the tornadoes in the Heartland and the warm forecast for many trick-or-treaters.

On Wednesday, the U.S. mainland saw record-high temperatures, while Hawaii's mountaintops received several inches of snow. Meanwhile, residents in the Great Plains prepared for possible tornadoes. 

Several inches of snow fell across high elevations of Hawail's Big Island just a day before Halloween

ABC News’ Marcus Moore has the latest on the emergency response and search and rescue efforts.

Three regions, including Andalucia and Valencia, were under Red Alerts on Wednesday.

Trick-or-treaters could possibly hit the streets in record heat across the Northeast. WLS-TV Chicago meteorologist Cheryl Scott reports.

Unseasonably warm air heading East next week could make for a hotter-than-average Halloween in New York, Philadelphia, the Raleigh-Durham metro area and Atlanta.

Hurricane forecasting has made tremendous strides in recent decades.