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Heat Index

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Half the Nation Faces Fourth of July Heat Wave as 160 Million Under Alerts
weather10 days ago

Half the Nation Faces Fourth of July Heat Wave as 160 Million Under Alerts

A dangerous Fourth of July heat wave is bearing down on the U.S., with more than 160 million people under heat alerts as humid conditions push heat indices into the 90s and 100s in many cities (Chicago could reach a 101-degree heat index). NBC’s seven-visual data package maps where, when and how bad the heat will be, highlighting risks to outdoor plans, increased energy demand, and vulnerable populations who should stay hydrated, seek shade, and limit sun exposure during the holiday weekend.

via NBC News|
#heat-alerts#heat-index#heat-wave
Heat Dome Pushes U.S. Cities Toward 100F for Fourth of July
world10 days ago

Heat Dome Pushes U.S. Cities Toward 100F for Fourth of July

A dangerous heatwave is building across the U.S. East Coast, with temperatures around 100F (38C) and heat indices up to 115F for several days over the 4 July weekend, driven by a persistent high-pressure 'heat dome' and drought; the heat threatens outdoor events including President Trump’s Fourth of July celebration and World Cup watch parties, prompting officials to urge people to stay indoors, hydrate, and seek cooling.

via BBC|
#heat-dome#heat-index#heatwave
Minnesota Braces for Dangerous Heat Wave With Heat Index Up to 110
weather13 days ago

Minnesota Braces for Dangerous Heat Wave With Heat Index Up to 110

An extreme heat warning spans most of Minnesota (and parts of Wisconsin) from 9 a.m. Monday to midnight Tuesday, with heat index values of 100–110°F due to high humidity; temperatures will reach the 90s with muggy overnight conditions. A few storms are possible Monday evening/night, and several counties are under tornado and severe thunderstorm watches. The heat and storm risk is expected to persist into the midweek with ongoing advisories in western and north-central Minnesota.

via FOX 9 Minneapolis-St. Paul|
#extreme-heat#heat-index#minnesota
Fourth of July Weekend Could See Record-Setting Heat Across Central and Eastern U.S.
weather13 days ago

Fourth of July Weekend Could See Record-Setting Heat Across Central and Eastern U.S.

A dangerous heat wave is forecast to build across central and eastern parts of the United States this week, with temperatures expected in the 90s to low 100s and the potential for triple-digit heat in some areas by the Fourth of July weekend, possibly breaking regional records. Forecasters from the Weather Prediction Center, including meteorologist Marc Chenard, warn of extreme heat and heat‑index risks, with detailed forecast maps available. Readers should plan for heat safety, stay hydrated, and limit outdoor activity during peak sun.

via The New York Times|
#central-to-eastern-us#heat-index#heat-wave
Upper Midwest Braces for Monday's Dangerous Heat Wave
weather13 days ago

Upper Midwest Braces for Monday's Dangerous Heat Wave

A dangerous heat wave hits the Upper Midwest Monday, with afternoon heat indices of 100–110°F driven by high humidity; highs in the low to mid-90s and overnight warmth offer little relief, and extreme heat warnings/advisories are in effect. If storms develop, they could bring damaging winds but overall thunderstorm chances remain 20–30%. The heat overlies a pattern that stays hot and humid through much of the week, with periodic thunderstorm potential and the risk of heat-related illness if precautions aren’t taken.

via MPR News|
#extreme-heat-warnings#heat#heat-index
East Coast Faces Blistering July Fourth Heat With Record Possibilities
weather13 days ago

East Coast Faces Blistering July Fourth Heat With Record Possibilities

Millions from the Midwest to the Northeast will endure a dangerous heat wave as a heat dome peaks around Friday, with many areas hitting 100°F or more and humidity driving heat indices around 110°F; nights will stay unusually warm, threatening health and amplifying risk of heat-related illness. More than 100 million people face major to extreme heat risk this week, with hundreds of daily and overnight temperature records potentially broken as outdoor Fourth of July events unfold and travel continues.

via CNN|
#heat-index#heat-wave#july-fourth
US braced for blistering heat as Fourth of July approaches
weather14 days ago

US braced for blistering heat as Fourth of July approaches

A dangerous heat wave is set to sweep the central and eastern United States this week with 111 million people under heat alerts. Daytime highs are expected in the 90s and 100s, with humidity pushing heat index values to 105–114 degrees. Cities such as Chicago, Kansas City, St. Louis, Nashville, Philadelphia and Boston could feel temps like 100+ degrees by midweek, with New York also approaching 108 and Philadelphia up to 112 later in the week. The heat will persist into the July Fourth period and poses serious health risks, while Europe is facing its own deadly heat wave.

via NBC News|
#heat-alerts#heat-index#heat-wave
Tropics on the Edge: Uninhabitable Heat and Mega-Floods by 2100
science5 months ago

Tropics on the Edge: Uninhabitable Heat and Mega-Floods by 2100

New climate models warn that by 2100 many tropical regions could regularly exceed dangerous heat levels (Heat Index above 103°F, with some places over 124°F) and experience a roughly 41% rise in extreme rainfall, pushing areas like India, Pakistan, Central Africa, and Southeast Asia toward uninhabitable conditions and increasing flood risk in underprepared megacities; another study projects hundreds of millions living in cities above the 29°C mean annual temperature threshold, underscoring stark adaptation gaps and inequality in resilience.

via Indian Defence Review|
#extreme-heat#extreme-rainfall#heat-index
Heat Wave to End Sunday, Humidity Persists
weather2 years ago

Heat Wave to End Sunday, Humidity Persists

A severe heat wave continues to affect the eastern United States, with peak temperatures expected in the Ohio Valley and Midwest before shifting to the Southeast and Plains early next week. Record highs and dangerous heat indexes are anticipated, prompting officials to warn about heat stress and the need for cooling measures. The heat may ease later next week but could return by July, with above-normal temperatures forecasted for much of the country.

via The Washington Post|
#heat-index#heat-wave#national-weather-service
San Antonio Breaks Heat Index Record for Second Year in a Row
weather2 years ago

San Antonio Breaks Heat Index Record for Second Year in a Row

San Antonio recorded its highest-ever heat index of 117 degrees on June 4, 2024, breaking last year's record of 116 degrees. High humidity and afternoon dewpoints in the mid-to-upper 70s have caused feels-like temperatures to soar into triple digits across South Central Texas. Residents are advised to stay hydrated, wear sunscreen, and take care of pets as the hot and humid conditions persist.

via KSAT San Antonio|
#heat-index#humidity#record-temperature