USA TODAY analysis found that 90-plus heat index days are becoming more frequent, starting earlier, lasting longer and occurring in longer streaks ...

At its most basic: the heat index is what the temperature feels like when you're outside. The chart above shows the combination of air temperature with humidity. It's very important to note the chart ...

A map shows areas in California where temperatures are expected to surpass 100 this week. There has been an early-season heat wave in Southern and Central California. On Monday, people in four states ...

Temperatures above 90 degrees are headed to some states in the upper Midwest and Northern Plains for Mother's Day.

New weather maps have shown where in the UK 20C heat could return following the Bank Holiday chill. Brits will be delighted to learn warmer weather could return to the UK after temperatures ...

The latest weather maps have revealed where in the UK we could see a return of 20C heat following the Bank Holiday chill. After temperatures took a nosedive over the Bank Holiday Weekend ...

A weather map from WXCHARTS for Saturday May 10 at 6am shows temperatures in mainland Europe will reach up to 15C with some heat also spreading across to the UK. In the UK, the map shows ...

Phwoaaar, now this is where the magic happens. Welcome to The Heat Map—a place for us to tell you about all the things we’ve seen recently and liked, bookmarked, actually bought or watched or ...

The latest forecast from the Met Office predicts that the heat will peak on the first day ... Met Office weather maps show that the region will get off to a warm start on May 1, with all areas ...

Recently, researchers have been investigating other, more subtle factors – from lunar cycles and weather to a surprising new possibility: the influence of solar heat. Geo explainer: What is the solar ...

Each year, vets see pets suffering from heat-related problems and illnesses, such as heatstroke, breathing problems, burnt paw pads and sunburn. 'Remember, be sure your animals have access to ...

New weather maps have revealed what areas could be hit with a heat blast with scorching temperatures of almost 30C next month. The latest data, by WXCharts, showed that major cities could bask in ...