3 dead after tornadoes, fierce storms hit Indiana, Arkansas; East braces for severe weather

Severe weather was forecast to threaten tens of millions in the Northeast and mid-Atlantic on Monday, one day after powerful storms swept through a large part of the country and left at least three people dead.

At least three tornadoes touched down in Indiana on Sunday night, killing one person. One tornado struck a home in Martin County, and another touched down in Johnson County. A third was reported in Monroe County, the National Weather Service in Indianapolis said.

In Arkansas, two people were killed when a tree plunged into a house.

More than 300,000 people remained without power Monday afternoon after storms battered Tennessee, Arkansas, Georgia, Kentucky and Michigan.

Here's what to know about Monday’s weather forecast:

Severe weather forecast in the mid-Atlantic; hail as large as 2 inches possible

A front moving eastward from the Midwest will create heavy rain and thunderstorms throughout the eastern U.S. on Monday, and there is an "enhanced" risk of severe weather in the mid-Atlantic, the Storm Prediction Center said.

According to the National Weather Service, the hazards associated with the thunderstorms are frequent lightning, severe wind gusts, hail and tornadoes.

In all, more than 24 million people live where severe weather is most likely Monday. That includes the Philadelphia, Baltimore and Washington, D.C., metro areas. A severe thunderstorm watch was in effect Monday afternoon for much of the Northeast and mid-Atlantic.

The weather service also warns of excessive rainfall across the region. Parts of Pennsylvania, Maryland, Delaware, Virginia and North Carolina are expecting heavy downpours, which could lead to flash flooding in urban areas, roads and small streams.

The storms also pose a threat for 2-inch hail or larger in southwestern Virginia and the western parts of North Carolina and South Carolina.

The Great Basin, Pacific Northwest, Northern California and Northern Rockies also can expect thunderstorms as upper-level impulses and a developing upper-level trough are creating showers expected to last through Tuesday.

Indiana tornado kills one

A tornado struck a home in Martin County and killed one person and injured another in Indiana on Sunday, Martin County Emergency Management Agency Director Cameron Wolf confirmed the death and injury, according to WXIN.

Several neighborhoods and homes were damaged or destroyed in parts of northern Johnson County, Johnson County Sheriff Duane E. Burgess said.

Damage includes roofs and downed power lines. People could be without power for days, Bargersville Deputy Fire Chief Michael Pruitt said.

Authorities said they will be enforcing a 9 p.m. to 6 a.m. curfew in the area hit by the tornado.

Tornado updates from IndyStar: Tornado hits Johnson County. Here's what we know.

2 die, 1 hurt when tree falls on home in Arkansas

Two people were killed and a third was injured Sunday night in the central Arkansas community of Carlisle when a tree fell onto a home, KTHV-TV reported.

A fierce storm downed trees, flipped cars and brought large hail in the area, according to THVII.

Power outages in Tennessee, Arkansas, Kentucky, Georgia, Michigan

According to PowerOutage.US, more than 90,000 homes and businesses in Tennessee and over 91,000 homes and businesses in Arkansas were experiencing power outages as of late Monday.

More than 47,000 customers were without power in Kentucky, 23,000 in Georgia and more than 55,000 in Michigan.

Where is the power out? Map shows over 400,000 outages across US, including Tennessee, Arkansas

Heat watches and warnings in parts of Texas, Louisiana, Mississippi, New Mexico

Parts of the South face more unrelenting heat Monday: Excessive heat watches, warnings and heat advisories were issued for parts of Texas, Louisiana, Mississippi and New Mexico as an intense heat dome baked the region.

US weather watches and warnings

National weather radar

The southern U.S. can expect temperatures in the high 90s, while portions of the Northeast and Midwest will see cooler temperatures than usual for this time of year. Highs will be in the 70s and 60s.

Contributing: The Associated Press; Gabe Hauari and Thao Nguyen, USA TODAY; IndyStar staff

This article originally appeared on USA TODAY: Indiana tornadoes, severe storms in eastern US: Weather forecast, news